E. Howard & Co. and Hezekiah Conant Differential
E. Howard & Co. and Hezekiah Conant Differential Gearing Mechanism
20th century
the glass boxed display to demonstrate how the Hezekiah Conant patent worked to average two escapements
11 x 13 x 7 inches
Condition Report: The case with some tarnish, there is no source of power, the mechanism works as intended.
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E. Howard & Co. and Hezekiah Conant Differential Gearing Mechanism
20th century
the glass boxed display to demonstrate how the Hezekiah Conant patent worked to average two escapements
11 x 13 x 7 inches
Condition Report: The case with some tarnish, there is no source of power, the mechanism works as intended.
Sale price
Estimate
Time, Location
Auction House
