The ingenious patented design of the Super Compressor case has a unique feature, the outside water pressure actually increases the case's total water resistance. This means the deeper the watch goes underwater, the greater its water resistance becomes, perfectly matching the depth. This was a serious dive watch for its time, and it still maintains a lot of character today with its rotating inner bezel, wide-set hour markers, and the distinctive twin crown setup. Brand: Hamilton Model: Super Compressor 600 Diver Reference: 64040-3 Size: 36mm Circa: 1970's Case: Stainless Steel Strap: Tropic strap Box & papers: No Location: Los Angeles Price: $2,500 Web/IG: [keepiece.co](http://keepiece.co) PICTURES/TIMESTAMP: [https://imgur.com/a/OzlSWaj](https://imgur.com/a/OzlSWaj) CONDITION & SERVICING \-The silver dial is showing a slightly darker appearance with a small mark under the hands. \-The hands and markers are matching in a light yellow hue. \-The previously lightly polished case is showing honest wear. \-Recently serviced by our watchmaker and comes with a 1 year warranty.