Patek Philippe Aquanaut 5168G-001. 20th Anniversary Edition. (Paying tribute to the 20th anniversary of the Aquanaut launched in 1997, new 42.2-millimeter “Jumbo” format) 42.2mm 18ct white gold case which is water resistant to 120 meters. Automatic mechanical caliber 324 S C movement, Parts: 213. Bridges: 6. Jewels: 29. Power reserve: Min. 35 hours – max. 45 hours. Central rotor in 21K gold, unidirectional winding. Balance: Gyromax®. Vibrations/hour: 28 800 (4 Hz). Balance spring: Spiromax®. Hallmark: Patek Philippe Seal. Embossed blue to black graduated dial with white luminescent applied white gold Arabic numerals and hands with outer minute markers. Sapphire crystal see through case back. Navy rubber strap with Patek Philippe double folding clasp. Box and papers dated February 2018.