About the rebluing: my 1913 DWM Police Luger is reblued also, this is made in the 30ies as they installed the Schiwy safety (trigger bar safety) in the Police amory and this can be observed on many Police Lugers.
I have seen that quite a few times, even when I have looked at Simpson LTD web page. I don�´t know if I�´m right but my idea is it should be a banner 1939 Mauser?
all you need is a middle toggle with a banner and #20
http://www.simpsonltd.com/product_in...oducts_id=2241