18K yellow gold, manual-winding, round-shaped, large gentleman’s wristwatch, with centre-seconds.Polished two-piece case, water-resistant with screwed case-back.Silver colour dial with radial applied yellow gold indexes.27 SC, Glucydur screw-balance and blued steel Breguet hairspring, index-regulator with swan-neck spring and micrometric screw, adjusted to heat, cold, isochronism and 5 positions, “Poinçon de Genève” (Geneva Quality Hallmark or Geneva seal).