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Otto Berg's Antique Darlot Portrait Petzval Lens

Currency:USD Category:Collectibles / Autographs Start Price:NA Estimated At:200.00 - 400.00 USD
Otto Berg's Antique Darlot Portrait Petzval Lens

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Auction Date:2022 Dec 15 @ 18:00 (UTC-5 : EST/CDT)
Location:15th Floor WeWork, Boston, Massachusetts, 02108, United States
ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed
Antique 19th-century Darlot portrait Petzval lens from the collection of Otto Berg, size 1-2, 2.25Àù diameter, 7Àù focus, engraved on the barrel, "A. T. Thompson & Co., Importers, Boston," and marked on the lenses, "12 3044 2866 Darlot, Paris." In very good to fine condition, with general overall wear; the rack and pinion mechanism works smoothly. A handsome and well-crafted lens, perhaps used by Berg in some of his optical experiments.