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E. Howard No. 74 Astronomical Regulator

Currency:USD Category:Antiques Start Price:15,000.00 USD Estimated At:30,000.00 - 40,000.00 USD
E. Howard No. 74 Astronomical Regulator
E. Howard No. 74 Astronomical Observatory Regulator. 12 in. silvered bronze Astronomical dial has black incised 5 minute numbers on the chapter ring with sub 24 hour dial and sub seconds dial having an open center, original blued hands, dial is signed E. Howard & Co., Boston, Mass. and numbered 305. Quality brass, weight driven movement has Graham deadbeat escapement with jeweled pallets, Geneva stop & maintaining power, movement signed E. Howard & Co., Boston; has an original silvered, 4 steel jar mercurial cluster pendulum with beat adjustment disc at the bottom, numbered 305 over 3364. Includes a gear in front of the escape wheel which originally would connect to a chronograph within the observatory, the gear would rotate with the escape wheel making 1 full rotation per minute; an electronic circuit between the clock & chronograph would be interrupted once every minute through a missing tooth in the gear allowing precise time to be tracked on the chronographs chart. The case has an iron back, cast in one piece on which the movement bracket and mahogany case front are mounted, has an iron side weight with 2 quality brass pulleys in the right side of the case which is partitioned by a wooden baffle and silvered bronze beat indicator plaque at the point of the pendulum; the electronic chronograph components have been removed from the clock which in in good running condition. 2 mounting screws are replaced on the side of the case. 60 in. high x 18.5 in. wide x 11 in. deep.