The 7897 Deep Diver is the second generation of the Deep Diver and the first to have a diving bezel. The production of the 7897 only lasted for two years, 1961 and 1962 and 1500 pieces were produced. Less than some “limited editions” from nowadays....
The 35mm case was rated to 200 meters, although 60 years later we wouldn’t recommend you tried it. This reference came in two versions, silver and black dial. While the silver had applied indexes the black version had painted and luminous filled indexes as well as arrow shaped hands.
Girard-Perregaux first applied the name “Gyromatic” to self-winding movements in 1957. These movements beat at the standard 18,000 bph (beats per hour). But as with anything, there was room for improvement, so in launching the Gyromatic line, that’s exactly what Girard-Perregaux set out to do.
While Girard-Perregaux’s first automatic watches used base movements made by A. Schild (and, later, Peseux), Girard-Perregaux was dissatisfied with their performance. So they developed a winding module, called the Gyromatic, which was then added to a blank manually-wound movement. The Gyromatic employed two “Gyrotron” wheels, which made the watch wind smoothly; additionally, each wheel had seven rubies on it to protect the movement from unnecessary wear.
Although Girard-Perregaux would go on to develop a hi-beat version of the Gyromatic in the late 1960s, early Gyromatics like this one are still excellent examples of self-winding technology—which was still in its infancy at this point.
Indeed, horological historians view these early Gyromatic movements as some of the most important ever produced.
This example we have for sale here is actually the best condition 7897 we have ever seen anywhere. The dial is just perfect! No flaws in anyway, perfect even patina, perfectly visible lettering and crosshair and perfect hands. To top it all off it is still on its original Gay Freres bracelet with GP signed clasp. In our opinion one of the most charismatic vintage diver out there still at an affordable price.