Closest is the 08 one? funny thing is, the 08 was issued without a hold open... they added them later... The particular frame this spring came out of is a Mauser 1938, but obviously not original to the gun.... But, it had issues with inconsistent hold open on the last round.. Put a WW2 Mauser mainspring in it, and boom! 100% hold open function...
..... I wonder if a mainspring change wasn't performed along with the hold open added operation?... Best to all, til...lat'r...GT ......
Thanks Rich!