Breguet BASEL 94
This perpetual-calendar chronograph for men shows the phases and age of the moon and remembers leap years. Along with an 18K yellow gold case with see-through back, it features a silvered gold dial entirely engine-turned by hand and individually numbered. Blued steel hands. Its 12-line, 21-jewel straight-line lever escapement features a screw-fitted balance wheel and a Breguet overcoil spring.