41 is the year of manufacture,
Manufacture is most likely MAUSER,
Im betting it has a "BYF" code stamp on the rear portion of the toggle, (its one of the more common variations)
The sn# is 3272 and as such almost every little part should be stamped with a 72 if its not a mixmaster.
"555" stamp is most likely misread. it prob got a "6"55 stamp instead.
That indicates either a 3rd rich army test proof or plane ole army aceptance stamp depending in the variation of stamp. The more stamps it has the easier it is to identify the history of it.
i think 3-450 is a safe offer. Its pretty much lost its collector value persay.
i say get some new grips for it, reblue it and make it pretty.
so ya can have even more fun with it. A nickle plated luger is an abomination to the gun gods.