Here are some pics. I don't have the original grips handy to photograph, but IIRC they did not have the "bullseye" imprint usually seen on VOPO grips.
I don't see any unusual stamps or markings...just the normal acceptance stamps (1st two with small eagle over 63, then a slightly larger "droop eagle" with no number).
The magazine, upon closer inspection, may have had a serial number ground or sanded off. It does have a bit of a flat spot on the very bottom. The the + sign and an eagle over 83 Waffenampt. No other marking visible on the magazine.
rob