A keyless lever chronograph movement for a pocket watch, Patek Philippe & Cie, Geneve, No.138407, 1905-10.

細節
A keyless lever chronograph movement for a pocket watch, Patek Philippe & Cie, Geneve, No.138407, 1905-10.
white enamel dial signed Patek Philippe & Cie, Geneve, Arabic numerals, outer seconds divided into fifths, inner red 24-hour numerals, subsidiary constant seconds and minute recording dials, signed and numbered frosted gilt movement with wolf's tooth winding and bimetallic compensation balance, diameter of dial 45mm.