Hello Raul,
I cannot help you with the ownership issue of this luger... <img border="0" title="" alt="[Wink]" src="wink.gif" /> , but on Jan Still's pistol forum...a 1915 holster posting came up that sounds very familiar to your friend's holster. Here is the link to that discussion on the Still discussion group :
http://www.gunboards.com/luger/topic.asp?TOPIC_ID=1437
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />