Unknown Variation

[tenbears]

I was hoping that someone might know more about this unusual Luger variation. Which belongs to someone else.
Thanks

Luger Information

Serial # 6 : Frame, locking bolt (twice: 1 big, 1 small), side plate, magazine (also has the 1), receiver on side & top
Front of grip frame - 11911
One marking on each side of receiver is pin punch stamped out. We see traces of the Vopo sunburst marking
Crown over N on barrel & receiver
Small 1 stamped on frame over trigger under the side plate
Geladen on left of extractor
"Gesichert" saftey marking
Other parts unnumbered (& unground)
This Luger came in in a shipment of 1000 guns we got out of East Germany in which there were many varied and interesting guns (all sold).
Well markings 97