Box Chronometer

Catalogue number:
2001.0162.01

Inscriptions:
"William Bond & Son, Boston" and ":Bond's Break Circuit"

Dimensions:
box 11.25 x 11.25 x 13 inches

Discussion:
This is a 56 hour chronometer with a later pattern Earnshaw spring detent escapement, and indications for hours, minutes, seconds, and up and down. It dates from around 1880. The movement, like that of most Bond chronometers, was probably made in England, while the Bond break circuit mechanism was made in the U.S. The Department of Physics at Columbia University donated this instrument to the Smithsonian in 2001. The winding key is marked "512" and is thus from a different piece.

Further Information:

Bond
Chronometer