Bond Box Chronometer

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 chronometer bears the inscription "William Bond & Son, Boston" and "Bond's Break Circuit." 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.
Currently not on view
Object Name
chronometer, contact
overall: 11 5/16 in x 13 1/16 in x 11 3/16 in; 28.702 cm x 33.1978 cm x 28.448 cm
ID Number
catalog number
accession number
Measuring & Mapping
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History, Kenneth E. Behring Center

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Enter the characters shown in the image.