AUCTION  / 

2006 Sept Sig Coin Long Beach Auction #416

Auction CurrencyUSD Auction LocationLong Beach Convention Center, 100 S. Pine Ave.,Room 103B, Long Beach, California, United States

Auction Details

<!--- --->
< Prev# Rows102050100Next >123. . .6061626364. . .137138139
 Choose Your Layout > Switch to Grid View Switch to List View
1855 G$1 AU58 NGC. Lightly circulated with honey-gold 3051 - 1855 G$1 AU58 NGC. Lightly circulated with honey-gold
Heritage Rare Coin Galleries
<B>1855<G$1> AU58 NGC.</B></I> Lightly circulated with honey-gold surfaces and evidence of clashed dies on both sides. An af...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (800.00) = 800.00
 
Details...Bookmark
1855 G$1 AU58 NGC. Pale golden colored and quite appea 3052 - 1855 G$1 AU58 NGC. Pale golden colored and quite appea
Heritage Rare Coin Galleries
<B>1855<G$1> AU58 NGC.</B></I> Pale golden colored and quite appealing for the grade with relatively smooth, abrasions-free ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (900.00) = 900.00
 
Details...Bookmark
1855 G$1 MS61 NGC. The 1855 is in demand both as a rep 3053 - 1855 G$1 MS61 NGC. The 1855 is in demand both as a rep
Heritage Rare Coin Galleries
<B>1855<G$1> MS61 NGC.</B></I> The 1855 is in demand both as a representative of the short-lived Type Two gold dollar, and w...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (2,000.00) = 2,000.00
 
Details...Bookmark
1855 G$1 MS61 NGC. Well struck with reasonably strong 3054 - 1855 G$1 MS61 NGC. Well struck with reasonably strong
Heritage Rare Coin Galleries
<B>1855<G$1> MS61 NGC.</B></I> Well struck with reasonably strong central definition, lacking only in the area of Liberty...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (2,000.00) = 2,000.00
 
Details...Bookmark
1855 G$1 MS62 PCGS. Satiny textured surfaces with plea 3055 - 1855 G$1 MS62 PCGS. Satiny textured surfaces with plea
Heritage Rare Coin Galleries
<B>1855<G$1> MS62 PCGS.</B></I> Satiny-textured surfaces with pleasing color for this conditionally elusive type. There is n...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (2,600.00) = 2,600.00
 
Details...Bookmark
1855 G$1 MS62 NGC. The usual clash marks seen on these 3056 - 1855 G$1 MS62 NGC. The usual clash marks seen on these
Heritage Rare Coin Galleries
<B>1855<G$1> MS62 NGC.</B></I> The usual clash marks seen on these Type Two coins are visible here, but the surfaces are lus...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (3,500.00) = 3,500.00
 
Details...Bookmark
1855 G$1 MS63 NGC. There are a few small marks scatter 3057 - 1855 G$1 MS63 NGC. There are a few small marks scatter
Heritage Rare Coin Galleries
<B>1855<G$1> MS63 NGC.</B></I> There are a few small marks scattered over each side, but none of singular importance. The st...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (7,500.00) = 7,500.00
 
Details...Bookmark
1855 G$1 MS63 PCGS. Creamy mint luster covers the surf 3058 - 1855 G$1 MS63 PCGS. Creamy mint luster covers the surf
Heritage Rare Coin Galleries
<B>1855<G$1> MS63 PCGS.</B></I> Creamy mint luster covers the surfaces of this rarely encountered, strictly Uncirculated Typ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (6,755.00) = 6,755.00
 
Details...Bookmark
1855-O G$1 AU55 PCGS. Partly reflective and wholly ori 3059 - 1855-O G$1 AU55 PCGS. Partly reflective and wholly ori
Heritage Rare Coin Galleries
<B>1855-O<G$1> AU55 PCGS.</B></I> Partly reflective and wholly original, this butter-yellow coin has a trace of wear on the ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (2,200.00) = 2,200.00
 
Details...Bookmark
1855-O G$1 MS63 PCGS. Type Two gold dollars were struc 3060 - 1855-O G$1 MS63 PCGS. Type Two gold dollars were struc
Heritage Rare Coin Galleries
<B>1855-O<G$1> MS63 PCGS.</B></I> Type Two gold dollars were struck at the New Orleans Mint in 1855 only, which makes the is...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (24,000.00) = 24,000.00
 
Details...Bookmark
1856-S G$1 Type Two AU55 PCGS. Double S. Breen-6045. O 3061 - 1856-S G$1 Type Two AU55 PCGS. Double S. Breen-6045. O
Heritage Rare Coin Galleries
<B>1856-S<G$1> Type Two AU55 PCGS.</B></I> Double S. Breen-6045. Only 24,600 pieces were produced of the Type Two design in ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (3,250.00) = 3,250.00
 
Details...Bookmark
1856-S G$1 Type Two MS61 NGC. The moderately prooflike 3062 - 1856-S G$1 Type Two MS61 NGC. The moderately prooflike
Heritage Rare Coin Galleries
<B>1856-S<G$1> Type Two MS61 NGC.</B></I> The moderately prooflike fields exhibit only faint abrasions. Well struck, since a...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (8,000.00) = 8,000.00
 
Details...Bookmark
1856 G$1 Slanted 5 MS63 PCGS. Surfaces dripping with s 3063 - 1856 G$1 Slanted 5 MS63 PCGS. Surfaces dripping with s
Heritage Rare Coin Galleries
<B>1856<G$1> Slanted 5 MS63 PCGS.</B></I> The surfaces drip with satin-like frost on this attractive example of this date.
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (700.00) = 700.00
 
Details...Bookmark
1856 G$1 Slanted 5 MS64 PCGS. Satiny luster enhances b 3064 - 1856 G$1 Slanted 5 MS64 PCGS. Satiny luster enhances b
Heritage Rare Coin Galleries
<B>1856<G$1> Slanted 5 MS64 PCGS.</B></I> Satiny luster enhances both sides of this well struck specimen. An unbeatable type...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (850.00) = 850.00
 
Details...Bookmark
1856 G$1 Slanted 5 MS64 PCGS. A gorgeous Type Three re 3065 - 1856 G$1 Slanted 5 MS64 PCGS. A gorgeous Type Three re
Heritage Rare Coin Galleries
<B>1856<G$1> Slanted 5 MS64 PCGS.</B></I> A gorgeous Type Three representative glowing luster atop the soft, gold surfaces. ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (1,250.00) = 1,250.00
 
Details...Bookmark
1856 G$1 Slanted 5 MS68 NGC. At this grade level, the 3066 - 1856 G$1 Slanted 5 MS68 NGC. At this grade level, the
Heritage Rare Coin Galleries
<B>1856<G$1> Slanted 5 MS68 NGC.</B></I> At this grade level, the 1856 is essentially non-existent. This is the first year o...
Bidding Has Concluded
Start Price : 17,000.00 | Estimate : 1.00 - 1,000,000.00
 
 
Details...Bookmark
1856 G$1 Upright 5 MS64 PCGS. An interesting variety t 3067 - 1856 G$1 Upright 5 MS64 PCGS. An interesting variety t
Heritage Rare Coin Galleries
<B>1856<G$1> Upright 5 MS64 PCGS.</B></I> An interesting variety that does not use Longacre's signature slanted 5. This ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (1,600.00) = 1,600.00
 
Details...Bookmark
1856-D G$1 --Altered Surfaces--NCS. AU Details. Variety 3068 - 1856-D G$1 --Altered Surfaces--NCS. AU Details. Variety
Heritage Rare Coin Galleries
<B>1856-D<G$1>--Altered Surfaces--NCS. AU Details.</B></I> Variety 8-K. A high grade survivor of this rare D-mint gold dolla...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (4,000.00) = 4,000.00
 
Details...Bookmark
1857 G$1 MS64 PCGS. Blushes of rich orange toning ensu 3069 - 1857 G$1 MS64 PCGS. Blushes of rich orange toning ensu
Heritage Rare Coin Galleries
<B>1857<G$1> MS64 PCGS.</B></I> Blushes of rich orange toning ensure the eye appeal of this lovely near-Gem. Well struck sav...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (1,200.00) = 1,200.00
 
Details...Bookmark
1857-C G$1 AU58 ANACS. Variety 10-L, the only known di 3070 - 1857-C G$1 AU58 ANACS. Variety 10-L, the only known di
Heritage Rare Coin Galleries
<B>1857-C<G$1> AU58 ANACS.</B></I> Variety 10-L, the only known dies. Some mint luster still adheres to both sides of this l...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (3,250.00) = 3,250.00
 
Details...Bookmark
1858-D G$1 AU58 NGC. Variety 10-M. Just a trace of wea 3071 - 1858-D G$1 AU58 NGC. Variety 10-M. Just a trace of wea
Heritage Rare Coin Galleries
<B>1858-D<G$1> AU58 NGC.</B></I> Variety 10-M. Just a trace of wear separates this coin from a Mint State grade. Although by...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (4,250.00) = 4,250.00
 
Details...Bookmark
1858-S G$1 MS61 NGC. The ''58-S has a mintage of only 3072 - 1858-S G$1 MS61 NGC. The ''58-S has a mintage of only
Heritage Rare Coin Galleries
<B>1858-S<G$1> MS61 NGC.</B></I> The '58-S has a mintage of only 10,000 pieces and is an important condition rarity in A...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (4,000.00) = 4,000.00
 
Details...Bookmark
1859-C G$1 MS61 PCGS. Variety 11-M. The 1859-C is a sc 3073 - 1859-C G$1 MS61 PCGS. Variety 11-M. The 1859-C is a sc
Heritage Rare Coin Galleries
<B>1859-C<G$1> MS61 PCGS.</B></I> Variety 11-M. The 1859-C is a scarce gold dollar in all grades. Probably only 85-95 indivi...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (9,500.00) = 9,500.00
 
Details...Bookmark
1859-D G$1 --Ex Jewelry--ANACS. AU50 Details. Variety 1 3074 - 1859-D G$1 --Ex Jewelry--ANACS. AU50 Details. Variety 1
Heritage Rare Coin Galleries
<B>1859-D<G$1>--Ex Jewelry--ANACS. AU50 Details.</B></I> Variety 11-N, the more obtainable of two die pairings. Here the 9 i...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (600.00) = 600.00
 
Details...Bookmark
1860 G$1 MS64 PCGS. The 1860 has a relatively low mint 3075 - 1860 G$1 MS64 PCGS. The 1860 has a relatively low mint
Heritage Rare Coin Galleries
<B>1860<G$1> MS64 PCGS.</B></I> The 1860 has a relatively low mintage with only 36,668 pieces produced. High grade examples ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (1,900.00) = 1,900.00
 
Details...Bookmark
1860-S G$1 MS61 NGC. Only 13,000 coins were produced i 3076 - 1860-S G$1 MS61 NGC. Only 13,000 coins were produced i
Heritage Rare Coin Galleries
<B>1860-S<G$1> MS61 NGC.</B></I> Only 13,000 coins were produced in this, the second to last year of gold dollar production ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (1,900.00) = 1,900.00
 
Details...Bookmark
1861 G$1 MS64 NGC. A lustrous yellow-gold example with 3077 - 1861 G$1 MS64 NGC. A lustrous yellow-gold example with
Heritage Rare Coin Galleries
<B>1861<G$1> MS64 NGC.</B></I> A lustrous yellow-gold example with a shiny patch beneath the bust. Generally well struck, th...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (950.00) = 950.00
 
Details...Bookmark
1862 G$1 MS64 PCGS. A bold khaki-gold representative o 3078 - 1862 G$1 MS64 PCGS. A bold khaki-gold representative o
Heritage Rare Coin Galleries
<B>1862<G$1> MS64 PCGS.</B></I> A bold khaki-gold representative of this popular Civil War date. Only the I in AMERICA is so...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (775.00) = 775.00
 
Details...Bookmark
1862 G$1 MS64 PCGS. A lustrous, smooth, and creamy exa 3079 - 1862 G$1 MS64 PCGS. A lustrous, smooth, and creamy exa
Heritage Rare Coin Galleries
<B>1862<G$1> MS64 PCGS.</B></I> A lustrous, smooth, and creamy example of this Civil War issue that is superior for the assi...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (775.00) = 775.00
 
Details...Bookmark
1864 G$1 MS66 PCGS. The 1864 gold dollar is an importa 3080 - 1864 G$1 MS66 PCGS. The 1864 gold dollar is an importa
Heritage Rare Coin Galleries
<B>1864<G$1> MS66 PCGS.</B></I> The 1864 gold dollar is an important Civil War issue that had a mintage of just 5,900 coins....
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (8,000.00) = 8,000.00
 
Details...Bookmark
1867 G$1 MS62 Prooflike NGC. Only 5,200 business strik 3081 - 1867 G$1 MS62 Prooflike NGC. Only 5,200 business strik
Heritage Rare Coin Galleries
<B>1867<G$1> MS62 Prooflike NGC.</B></I> Only 5,200 business strikes were coined and this is a scarce date, although when it...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (1,600.00) = 1,600.00
 
Details...Bookmark
1868 G$1 MS62 NGC. A gold-green piece with slight refl 3082 - 1868 G$1 MS62 NGC. A gold-green piece with slight refl
Heritage Rare Coin Galleries
<B>1868<G$1> MS62 NGC.</B></I> A gold-green piece with slight reflectivity on both sides, though not enough for the designat...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (850.00) = 850.00
 
Details...Bookmark
1870-S G$1 AU55 PCGS. Lightly worn in a highpoint patt 3083 - 1870-S G$1 AU55 PCGS. Lightly worn in a highpoint patt
Heritage Rare Coin Galleries
<B>1870-S<G$1> AU55 PCGS.</B></I> Lightly worn in a highpoint pattern with plenty of luster. The surfaces have patches of vi...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (1,300.00) = 1,300.00
 
Details...Bookmark
1871 G$1 MS61 PCGS. Delicately abraded with noticeable 3084 - 1871 G$1 MS61 PCGS. Delicately abraded with noticeable
Heritage Rare Coin Galleries
<B>1871<G$1> MS61 PCGS.</B></I> Delicately abraded with noticeable softness in the centers that shows on the date and the O ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (900.00) = 900.00
 
Details...Bookmark
1871 G$1 MS64 NGC. A beautiful example, produced from 3085 - 1871 G$1 MS64 NGC. A beautiful example, produced from
Heritage Rare Coin Galleries
<B>1871<G$1> MS64 NGC.</B></I> A beautiful example, produced from newly polished dies. Attractive two-toned, mellow orange-g...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (2,004.00) = 2,004.00
 
Details...Bookmark
1873 G$1 Open 3 MS64 NGC. A thoroughly original straw- 3086 - 1873 G$1 Open 3 MS64 NGC. A thoroughly original straw-
Heritage Rare Coin Galleries
<B>1873<G$1> Open 3 MS64 NGC.</B></I> A thoroughly original straw-gold dollar with outstanding luster and a solid strike. Th...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (750.00) = 750.00
 
Details...Bookmark
1873 G$1 Open 3 MS65 PCGS. Along with the 1874, the 18 3087 - 1873 G$1 Open 3 MS65 PCGS. Along with the 1874, the 18
Heritage Rare Coin Galleries
<B>1873<G$1> Open 3 MS65 PCGS.</B></I> Along with the 1874, the 1873 Open 3 is one of the relatively high mintage dates duri...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (2,000.00) = 2,000.00
 
Details...Bookmark
1874 G$1 MS66 PCGS. Among Type Three gold dollars, thi 3088 - 1874 G$1 MS66 PCGS. Among Type Three gold dollars, thi
Heritage Rare Coin Galleries
<B>1874<G$1> MS66 PCGS.</B></I> Among Type Three gold dollars, this issue is one of the most popular candidates for type set...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (2,400.00) = 2,400.00
 
Details...Bookmark
1878 G$1 MS66 NGC. An issue that is seldom offered as 3089 - 1878 G$1 MS66 NGC. An issue that is seldom offered as
Heritage Rare Coin Galleries
<B>1878<G$1> MS66 NGC.</B></I> An issue that is seldom offered as a Gem, let alone a Premium Gem. The 1878 (3,000 business s...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (3,750.00) = 3,750.00
 
Details...Bookmark
1880 G$1 MS64 NGC. A shining yellow-gold example, bold 3090 - 1880 G$1 MS64 NGC. A shining yellow-gold example, bold
Heritage Rare Coin Galleries
<B>1880<G$1> MS64 NGC.</B></I> A shining yellow-gold example, boldly struck and quite lustrous. A few tiny marks in the obve...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (1,400.00) = 1,400.00
 
Details...Bookmark
1880 G$1 MS67 PCGS. 3091 - 1880 G$1 MS67 PCGS.
Heritage Rare Coin Galleries
<B>1880<G$1> MS67 PCGS.</B></I> A luxuriant frosty sheen blankets each side of this marvelous Superb Gem. The design element...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (4,000.00) = 4,000.00
 
Details...Bookmark
1884 G$1 MS67 NGC. A semi-prooflike specimen, as are m 3092 - 1884 G$1 MS67 NGC. A semi-prooflike specimen, as are m
Heritage Rare Coin Galleries
<B>1884<G$1> MS67 NGC.</B></I> A semi-prooflike specimen, as are many examples of this date. The lightly frosted design moti...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (3,500.00) = 3,500.00
 
Details...Bookmark
1884 G$1 MS64 Prooflike NGC. Well struck with incredib 3093 - 1884 G$1 MS64 Prooflike NGC. Well struck with incredib
Heritage Rare Coin Galleries
<B>1884<G$1> MS64 Prooflike NGC.</B></I> Well struck with incredibly bright, frosty surfaces that seem pristine. The dark fi...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (1,400.00) = 1,400.00
 
Details...Bookmark
1885 G$1 MS64 NGC. Well struck, with frosted surfaces 3094 - 1885 G$1 MS64 NGC. Well struck, with frosted surfaces
Heritage Rare Coin Galleries
<B>1885<G$1> MS64 NGC.</B></I> Well struck, with frosted surfaces and attractive luster. A few light obverse pinscratches pr...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (1,000.00) = 1,000.00
 
Details...Bookmark
1887 G$1 MS67 PCGS. The 1887 is another low mintage is 3095 - 1887 G$1 MS67 PCGS. The 1887 is another low mintage is
Heritage Rare Coin Galleries
<B>1887<G$1> MS67 PCGS.</B></I> The 1887 is another low mintage issue from the 1880s with only 7,500 pieces struck. This pie...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (4,500.00) = 4,500.00
 
Details...Bookmark
1889 G$1 MS64 NGC. A pleasing wheat-gold near-Gem from 3096 - 1889 G$1 MS64 NGC. A pleasing wheat-gold near-Gem from
Heritage Rare Coin Galleries
<B>1889<G$1> MS64 NGC.</B></I> A pleasing wheat-gold near-Gem from the last year of issue. Generally well struck with great ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (725.00) = 725.00
 
Details...Bookmark
1889 G$1 MS64 PCGS. Flashes of semi-prooflike reflecti 3097 - 1889 G$1 MS64 PCGS. Flashes of semi-prooflike reflecti
Heritage Rare Coin Galleries
<B>1889<G$1> MS64 PCGS.</B></I> Flashes of semi-prooflike reflectivity show in the fields and the device remain nicely contr...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (850.00) = 850.00
 
Details...Bookmark
1889 G$1 MS67 PCGS. 3098 - 1889 G$1 MS67 PCGS.
Heritage Rare Coin Galleries
<B>1889<G$1> MS67 PCGS.</B></I> Final year of issue and always a popular coin as such. This fully struck example has thick, ...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (3,000.00) = 3,000.00
 
Details...Bookmark
1889 G$1 MS67 NGC. Survivors of this issue, the last g 3099 - 1889 G$1 MS67 NGC. Survivors of this issue, the last g
Heritage Rare Coin Galleries
<B>1889<G$1> MS67 NGC.</B></I> Survivors of this issue, the last gold dollar struck for circulation, are often seen in the h...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (3,000.00) = 3,000.00
 
Details...Bookmark
1876 G$1 PR63 PCGS. As an issue, the 1876 is the rares 3100 - 1876 G$1 PR63 PCGS. As an issue, the 1876 is the rares
Heritage Rare Coin Galleries
<B>1876<G$1> PR63 PCGS.</B></I> As an issue, the 1876 is the rarest gold dollar delivered after 1875. Only 3,200 business st...
Bidding Has Concluded
Estimate : 1.00 - 1,000,000.00
Sold to floor for (3,750.00) = 3,750.00
 
Details...Bookmark