Type XX Transatlantique chronograph in steel. Self-winding movement with date at 6 o?clock and small seconds. 30-minute and 12-hour counters. Graduated turning bezel set with 49 diamonds (approx. 0.63cts) and a sapphire at 12 o?clock. Mother-of-pearl dial with luminous hands and numerals. Screw-locked crown. Water-resistant to 100 metres (330ft.).