Ca. Ø50mm, ca. 88g, original silver case with gold hinges, back with enamelled noble coat of arms (enamel restored), case and movement number 33712, signed dome, early Ankerchronometer movement with crown winding, wolf's toothing, especially large balance, special moustache lever, wonderfully preserved signed enamel dial, fine Breguet steel hands, intact, cleaning recommended, in this case design and with the early chronometer movement, this is a very interesting Patek Philippe collector's watch.