Parts of a Marine Chronometer
The pieces of a disassembled Breguet marine chronometer. According to the card, it has a glass hairspring.
[MAM, paris 2006]
aperture=f/2.8 focal=7.4mm (35mm equivalent: 35mm) exposure=0.077 s (1/13)
Clock Escapment Models
Models of Detante, Duples and Verge excapaments by Perrelet(perhaps not A. L.) 1822
[MAM, paris 2006]
aperture=f/2.8 focal=7.4mm (35mm equivalent: 35mm) exposure=0.050 s (1/20)
Breguet Resonance
aperture=f/2.8 focal=7.4mm (35mm equivalent: 35mm) exposure=0.077 s (1/13)