Olle,
in case it may be useful ...
maybe like this restored one - which looks all blackish on my screen ?
http://www.lugercollector.com/_490_m...s42_luger_1939
or
this S/42 same year
http://www.rockislandauction.com/vie...id/52/lid/3464
or
http://www.phoenixinvestmentarms.com...1761BW4142.htm
and several more with a search like
https://www.google.com/imghp?hl=en&t...ed=0CAQQqi4oAg
and use search like "luger 42 1939" or "luger code 42 1939"
search seems to find various closed auctions as well as the websites
good luck in the quest !
Bill