The Nautilus Ref. 3700/1 (and similar 3700/11) is a sports watch by Patek Philippe, introduced in 1976 which is characterized by its combination of luxury gold and stainless steel. Its design is inspired by the shape of ship portholes. The case is quite large at 42 mm but thin at just 7.6 mm and the integrated bracelet makes it wear smaller. Still, watch enthusiasts at the time nicknamed the original Nautilus “Jumbo” for its large size.