Gew 98 Scope?

[Surpmil]

Yes, it is a WWI scope and was originally fitted with double claw bases. Under the solder below the rifle number is the letter suffix to the serial number.

These scopes like most scopes of that era are relatively easy to service due to their simplicity and the fact that little if any waterproofing mastic etc. was used.

Some of the later war German scopes started to make use of zinc alloys for certain parts like lens cells and those can corrode and/or become brittle with time.

Here is another of a similar vintage. The rear "foot" has been silver or nickel plated at some point to try to eliminate the play that would develop in the windage adjustments over time.

The second example shown has clearly also been "sporterized" post-WWI.

Here's one I owned with the case and showing four post reticule as noted by Hesketh Prichard in his book (for aiming against lighter sky instead of dark foreground.)