The minimalist retro design of this Girard Perregaux Gyromatic is extravagant and eye-catching. The 70s diver's watch offers outstanding mechanical quality and due to its mint condition it's a super valuable collector's item. The case of the Gyromatic is a so-called "Super Compressor". The deeper you dive with the watch, the harder the case back is pressed against the sealing ring, thus resulting in increased water resistance. This unique case design comes from Ervin Pequerez S.A (EPSA), who supplied the most prestigious watch brands with his case in the 60s and 70s. A typical feature of an EPSA Super-Compressor are the twin crowns on the right side of the case. The upper crown is used to turn the inner bezel and the lower one is used to wind the movement and set the time. The heart of this watch is the Girard-Perregaux in-house caliber Gyromatic 441, which is an automatic high-frequency movement with 36000 vibrations, hence the inscription on the dial: "highfrequency". This high quality movement features a rare mechanism for date quickset. By repeatedly pulling out the crown at 4 o'clock, the date is increased by one day at a time. In addition, this caliber has a hacking second function: when setting the time, the second hand stops, so that the time can be set to the second. Timestamp: https://imgur.com/a/lSZkKzj Information: Girard Perregaux Super Compressor Diver Gyromatic 4057 Reference: 4057 Circa: 70's Dial: Tritium - Mirror Sector Dial - Great patina Hands: Tritium - great shape intact lume with matching patina Bracelet: Rubber strap Case: Unpolished 44mm x 44mm Lug to Lug x 12mm Thickness - Stainless Steel Lug Width: 22mm Movement: Girard-Perregaux Gyromatic 441-296 - Automatic - (+2 s/d 237 amp) Functions: Hours, Minutes, Seconds, Date Accessories: N/A Crystal: Acrylic Strap size: 7.75” Condition: Excellent Pre owned condition Case is unpolished with very light normal wear. Strap is aftermarket and in new condition. Dial has some spots but lume has patina and is intact. Hands have matching patina and are in great shape. Crystal is in great shape. Watch runs great at +2 s/d 237 amp Asking $4,250 via bank wire or Zelle. Price includes fully insured shipping in the USA. $55 shipped outside of the US Ebay: https://www.ebay.com/usr/belmont\_watches?\_trksid=p2047675.l2559 Instagram: https://www.instagram.com/belmontwatchessd/ Website: https://www.belmontwatches.com