C. Three-body, polished, black leather, folding strut on the back. D. Two-tone silver with luminous Arabic numerals, outer blue graduation for the days of the month, apertures for the days of the week, the months and moon phases. Blue alpha hands. M. Cal. 155, rhodium-plated, 15 jewels, lever escapement, monometallic balance, self-compensating Breguet balance spring. Patented Ermeto winding by sliding the case. Dial, case and movement signed. Dim. 36 x 50 mm.