Hi I am a long time FFL and collect Civil War, Indian wars, WW2 German....guns, photos, paperwork and such, I also collect WW2 Walther PP 32's. My latest has got me stumped. It is Nazi proofed, Eagle over N...all that is correct. The Serial # on the right side of the grip is: 227566p.....cool....but on top of the ser. # is a "d" or a "p" which would face the trigger. Does anyone out there know what that added letter means??? Thanks Gary Wanna kill these ads? We can help!