Calibre 7500, 17 jewels, the guilloched dial with sunburst effect, painted Breguet-style numerals for the minutes, outer minute track, quadrilateral aperture for the jumping hour, in two-part case, curved and tonneau-shaped, back secured by four screws, 18k white gold FM buckle, case, dial and movement signed
Dimensions: 28 x 38 mm.