This Rare Ref. 5370P-001 Grand Complications Platinum Split-Seconds Chronograph Is Complete. Accompanied with its certificate of origin, second case back, swing tag, instruction manual, and presentation box. This 5370P-001 is like new and comes from the original owner.

The 5370P-001 split-seconds chronograph is one of the three most difficult complications to master, alongside the tourbillon and the minute repeater. It takes a highly sophisticated mechanism to control the two chronograph hands, one of which may be stopped to measure an intermediate or lap time or retain a reference time while the other continues its course unaffected, even by fractions of a second. When released again, the split-seconds hand instantly catches up with the primary hand and the two stacked hands move on together.

The 5370P-001 is manually wound mechanical movement. Caliber CHR 29-535 PS. Seconds subdial. Tachymeter scale. The dial is a authentic black enamel, gold applied Breguet numerals. 18K gold dial plates. The case is platinum Interchangeable full back and sapphire-crystal case back. Water resistant to 30 m. Case diameter: 41 mm. Height: 13.56 mm and the alligator strap with square scales, hand-stitched, shiny black. Fold-over clasp.