Speaking of 1946S........

[Barzilla]

Does this look like a legitimate RPM?

Nearest thing I could find in CC was MM-006 but I really don't see it there.

Just keeping the ball rolling, so to speak.

Thanks in advance.

[Antiquity]

Not seeing any RPM myself. Keep on keeping on.

[pennies4pennies]

To me it doesn't look like one. More die wear then anything to me. Your on the right track. Keep the hunt up.