My friend, I don't know. My Lugers with original grips and even numbered to the gun are kinda sloppy fitting around the mag release and are curved at the sideplate. They are wartime though. Even my 1920 Commercial is lacking at the sideplate. You may be right about universal fit. Wish they would give a view of the left sideplate side but they don't. sorry I can't give you a better answer.
Maybe one of our long time collectors can give an answer. Maybe it has something with with average Schutz popping that area off when removing the grip so they relieved it.?????
Charlie
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