I have a Sears KS500 with it's 50mm f2 lens and am impressed with this simple SLR. Checking for instruction books I see it is a KR-5 marked and sold through Sears. The only operational problem is that I left eyed so the advance lever stand-off pokes me in the forehead, and I cannot leave the lever in as it locks the shutter button and turns off the meter! Otherwise a great knockabout 35mm SLR that was only $5 at a camera show/sale.