Help for a friend

[doncom]

Originally Posted by DavidJayUden

The gun is probably a good shooter. I'm seeing a commercial Luger, probably cold blued and with aftermarket grips. Stock lug has probably been ground off. Made in the 1920's would be my guess. Is it 9mm or .30 cal?
Anything else you need?
dju

Thank you kind sir.

I think it's a .30 cal. I was surprised with the three digit SN. Is that rare at all?