This is one of the manufactured 150mm rangefinder cams. They'll need to be sanded and deburred to work, dimensions are very close but it's a bit past infinity out of the box, and it jumps at those two burr points. They all have those two points.
So I'm going to work on sanding one and see how it goes.
If you're in the US and want one, message me your address. I'll just send it with a standard letter envelope and one stamp. You will have to sand it yourself.