Two-body, solid, polished, transparent case back with 4 screws, protected winding crown, sapphire crystals. Matte silver with applied yellow gold dart indexes and Arabic numerals, subsidiary seconds dial at 6, 10 day power-reserve indication at 12. Yellow gold dauphine hands. Cal. 28-20/220, stamped with the Seal of Geneva quality mark, rhodium-plated, fausses cotes decoration, 29 jewels, 9 of which in 18K gold chatons, straight- line lever escapement, Gyromax balance adjusted to heat, cold, isochronism and 5 positions, shock absorber, self-compensating free-sprung flat balance spring, double barrel.

Ref. 5100,5100R-001,5100P-001,5100G-001 5100R 5100J-001 5100J 5100G 5100P Etc.