Aquanaut is a relatively young collection from Patek Philippe. The first generation, Ref. 5060, debuted in 1997 as the younger brother of the Nautilus. Since then, the collection has evolved into the second generation, the 5065 (1998), and then to the current 5167 (2007). The one we are reviewing here, Patek Philippe Aquanaut Jumbo 5168G Khaki Green White Gold watch replica ref. 5168G (from 2017), known as Jumbo, is a larger version of the current generation Aquanaut. The Case This watch replica 5168G was introduced at Baselworld 2019 with a 42.2mm case in 18K white gold, khaki green dial, and rubber strap. I think it reflects Patek Philippe's positioning of the Aquanaut as a sportier collection in its catalog. For Patek Philippe, 42.2mm is one of the largest watches, and only rivaled by the Calatrava Pilot Travel Time, Flyback Chronograph Annual Calendar (both 42mm), and the Celestial (44mm), which is a Grand Complication. The slim case height of 8.25mm, the flat profile an