Three-body, polished and brushed, stepped bezel, transparent snap-on case back, sapphire crystals. White and engraved yellow gold, the hour graduation on three rotating translucent sapphire discs, each with four painted black stylized hour indicators, on top, white sector indicating the 60 minutes in painted Arabic numerals and indexes, at the center, a rhodium-plated wheel with three arms, carrying the spring-loaded rotating star wheel sapphire discs. Cal.2124, rhodium-plated, fausses cotes decoration, 33 jewels, straight-line lever escapement, monometallic balance adjusted to heat, cold, isochronism and 5 positions, shock absorber, self-compensating flat balance spring, micrometer regulator, rotor with 21K gold segment.