I stumbled across what I believe to be an extremely rare GEM razor recently. I have never seen it before, nor do I remember ever reading anything about this razor. I've done some research the last few days and haven't found anything about it. I've google searched it using every term I could come up with and have come up empty. So, here are some pictures and description of the GEM adjustable single edge razor. The frame is very similar to the Push Button, it is opened by depressing the top of the black lever that is located on the top of the back of the handle. It has a thumb wheel numbered 1-9, the frame is closed by pressing the bottom of the lever back into the handle. When the thumb wheel is turned from 1 to 9 the guard bar moves down away from the blade increasing the space between the blade and the guard bar. In this picture you can see a line that has been cut into the blade tray. The bar next to this cut that is connected to the guard bar moves up and down in the cutout area next to the line. There are no patent numbers anywhere, and the GEM name doesn't appear anywhere except on the handle. It's kind of hard to see but the number 24 is scratched into the bottom of the frame. In this picture it's on the flat surface under the opening. Here's just a few more shots of it. Overall, it's in excellent condition, just a couple minor scratches here and there. it's a very heavy razor due to the mechanism that connects the thumb wheel to the frame. Has anyone here ever seen one of these before? I have a theory that this was possibly a prototype and this was never actually marketed to the public. It seems like if many of these had been sold one should have turned up by now. The 24 looks like it was put on there to identify this one as being "razor 24". A member on another forum found the patent application, it was filed in 1960 and approved in 1963. I am very proud to have added this to my collection, and would love to see if any more of these are around. Enjoy!