I picked up a couple of boxes of broken cameras and lenses. There are 2 Kowa Six's, one chrome and the other black. The winding knob on the black one won't move but if I manually cock the front with the lens removed it will cock and fire when I press the shutter. The chrome one will not lock when I manually cock it and the winding knob just spins and clicks. I personally like the chrome better and will most likely send it to Ross Yerkes for repair but I want to try to take the sides off the black one and see what is broken but I am off to a horrible start since I can't even get the winding knob off. Anyone do this before?