Doubs,
I've been paying a little more attention to real steel, ran into a photo (I think it was a gun on an auction site?) which was patently an early Commercial, with the petal-style Crown/N as on Pete's Luger.
It has been pointed out to me that Costanzo, in his zeal to accurately portray the markings appearing on Lugers, may have made categorical distinctions which (as you point out) could simply have resulted from the dies at hand which satisfy the generic requirement "Crown over the letter N".
--Dwight
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