This is the Leitz Summicron 50mm R-only cam.
	Here you can see the R cam, it means this one is quite modern.
	First, unscrew the six bayonet screws.
	Now, the three black ones.
	Lift the black shroud with the plastic tool.
	It has to arrive to the vertical..
	This way it's possible to remove it.
	Now remove the bayonet.
	Look for the small ball.
	Put it in place and add a very small amount of special grease.
	Install the Leica-Pentax or the Leica-Nikon bayonet, the red dot in front the scale center for Pentax, and slightly to the right for Nikon.
	Lens ready for Pentax and Nikon cameras, this one was easy.
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