The Patek Philippe Nautilus Jumbo Ref 3700/1JA is an important vintage Patek Philippe. It is rated 9.5 out of 10, and measures 40.6mm wide, 44.5mm long, and 8mm thick. It has a beautiful blue dial, the movement is the automatic Patek Philippe Caliber 28 255C with 36 jewels, adjusted to 5 positions and heat/cold, and stamped with the Geneva Seal. The movement features a free-sprung balance and an 18k rotor segment for increased winding efficiency. The bracelet is in good shape, with clear and visible Patek logo.