179736 ⎘
Apparatus for measuring unknown time intervals by mechanical means using a mechanical oscillator; Watches or clocks with stop devices, e.g. chronograph; Special arrangements Modular constructions involving interchangeability with one or more chronograph modules on a single base movement
Dual display timepiece
#2Device comprising a clock movement and a chronograph module
#3Device comprising a clock movement and a chronograph module
#4Device comprising a clock movement and a chronograph module
#5Modular horological movement
#6Modular timepiece movement
#7Watch with independent modules
#8Device comprising a clock movement and a chronograph module