Black Widow, byf-41 - Should I Buy?

[Mauser720]

byfMostlyMatching -

Here is a list that appears in the FAQ portion of the "New Collectors Forum" which might be helpful.

Mauser720 - Ron

What parts must be numbered on a Luger?
The following parts should have serial numbers on them:
Frame, full serial number with suffix
Under barrel, full serial number with or without suffix
Left side of the receiver, full serial number without suffix.

All the following parts should have the last two numerals stamped on them:
Firing pin
Extractor
Sear bar
Breechblock
Front toggle link
Rear toggle link
Locking bolt (takedown lever)
Side plate (with a few exceptions through the years, see comments on side plate)
Trigger
Safety lever
Safety bar
Hold-open latch
Grips (inside)
Note, that the rear toggle pin was not serial-numbered until 1932.
There were two "styles" of serial number marking, Commercial style and Military style. In commercial style some of the numbers, notably the side-plate and locking bolt, were stamped underneath in a way which did not affect the surface look of the gun--military serial numbers were stamped on the visible surfaces. If your mismatched parts are stamped highly visibly they likely come from military guns.