Germany used many surplus pistols in post war era for its police and army, yours is probably one of them. I had a Inglis Browing High Power arsenal refinished by them, beautiful gun. Markings I'm not sure of. Don't know if the markings are a + or - , here is one on auction, make your own judgement. I put $800 in an excellent Rem 1911A1 made in 1945. How much for yours?
http://www.auctionarms.com/search/di...temNum=2962740
RK