Here is a link to the photos. It shows all the original "before" photos and the last dozen or so on a white background are the "after" ones. The proof marks are much more legible now.

I'm happy to say that all the numbers match on the entire gun! The lever, forend, barrel and receiver are all marked "30" for their serial #. One part on the receiver says "30L" which I suppose is either the maker or seller, whoever Mr. "C. LEB****, ****MBERG" is as shown on top.

https://moritz.homeserver.com/PhotoViewer/album634135129003437500/index.xml