1939 luger

[al in pa.]

hi, i'm normally at an m1 forum but was asked by a friend to post about his luger . i'll do the best i can with the nonclemature
1939 - top of reciever/action
serial 1715, all parts stamped 15,no replacement parts.
s/42 on toggle
under right safety, GESICHERT
blonde wood grips ,lightly worn smooth,no chips
heraldic eagles / mauser military proofs on barrel and frame
TT or PI symbol - straight wing eagle - drop wing eagle on frame and drop wing eagle on barrel
shiney bore,strong rifling
bluing 80% ?? guess. worn blueing on sharp edges and weak blue on rest no rust or pitts
friend bought in 1955 for $50 from ww2gi bring back.
any info and ballpark value would be appreciated
sorry no pics
thanks in advance
al in pa.