PATEK PHILIPPE FOR BEYER ZURICH
Patek, Philippe & Cie., Genève, "Fabriqué Pour Beyer, Zurich",
No. 169519, case No. 277438. Made circa 1912.
Fine, 18K yellow gold keyless pocket watch.
Four-body, "bassine", polished. Hinged gold cuvette.
White enamel with Breguet numerals, outer minute track
and sunk subsidiary seconds. Blued steel spade hands.
18''', frosted gilt patented bridge caliber, 17 jewels, wolf 's
tooth winding, straight line "moustache" lever escapement,
cut bimetallic compensation balance with blued steel Breguet
balance spring, index regulator.