C. Three-body, rounded bezel, straight lugs with screwed bars, fluted band, case back with 6 screws, protected ballshaped winding crown edged with dots, sapphire crystal, corrector on the band. D. Bi-color, red and satine gilt with large red Arabic numerals for the retrograde minutes sector, aperture for the jump-hour at 12, sector for the retrograde date at 6, outer 1/5th seconds track quarter Arabic markers. Steel skeleton hands. M. Cal. GG7723, rhodium plated, oeil-de-perdrix decoration, 27 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring, hack mechanism. Dial, case and movement signed. Diam. 45 mm. Thickness 12 mm.