I just got this gun back from Tom Heller who gave it some TLC. It got a new 4" barrel and a spring to match the .30 Luger it had been chambered for. I haven't fired it yet, but he did and said it feeds and shoots nicely! I re-finished the grips too (twice - too dark the first time).
I'm still interested to see what people think about the proof marks on the photos above. Thanks for looking.
BTW, I got a Mec-Gar mag to use for shooting. These better photos really make the finish look more worn than is apparent in-hand. The ol' girl obviously has a few miles on her, but hopefully now she at least looks right and is good for shooting again.