Yeah, I got to thinking that the 1-1/2 frame also uses the same buttplate as a 2 frame.
That's why I added 1-1/2 frame the possibility. Firing pin spacing will not tell the whole story since 2 and 1-1/2 are the same. Will have to check out other dims such as breech ball width or height of standing breech.
I am surprised that the frame size marking is completely illegible. But, I have seen some stamped pretty light. Or maybe it was removed for some reason.
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B. Dudley
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