This Annual Calendar Patek Philippe Nautilus Stainless Steel Ref 5726A-001 is complete. Accompanied with certificate of origin, additional new strap, swing tag, setting pin, instruction manual and presentation box. This is an extremely hard reference to find. This example is from 2020 and is unworn. This watch comes with a 2 year warranty.

The reference 5726A-001 is Self-winding mechanical movement. The Caliber 324 S QA LU 24H/303. Day, date, month in apertures. Moon phases and 24-hour display. Sweep seconds hand.DIALDial: black, gold applied hour markers with luminescent coating. The case is a Steel. Screw-down crown. Sapphire-crystal case back. Water resistant to 120 m. Case diameter (10-4 o'clock): 40.5 mm. Height: 11.3 mm. The strap is an Alligator strap with rectangular scales, hand-stitched, matt black and Nautilus fold-over clasp.

The reference 5726A-001 was launched in 2010 and available in stainless steel with leather strap only. Patek Philippe began production of a new version with light silvered dial and stainless steel bracelet in 2012.