Related Terms — History
Swiss-French horologist who revolutionized watchmaking with innovations like the tourbillon and Breguet spiral
GMT-Master II with black and blue bezel insert, resembling Batman's color palette.
Balance wheel made of two different metals to automatically compensate for temperature changes
Hairspring with specially shaped terminal curve invented by Abraham-Louis Breguet for improved chronometry
Verification process confirming genuine Crown military issuance by examining hallmark placement and stamps.
Authentication marker establishing military issuance history through official Crown ownership symbols.
Measurement of how accurately a chronometer maintains timekeeping over extended periods
Standard of accuracy required for movements to be officially certified as chronometer-quality