Springfield Research Service
U.S. Martial Arms Serial Number Data
http://www.armscollectors.com/srs.htm
Although it does not cover any guns
I own, I thought this site was very interesting, here is info on Luger Pistols
Serial number range 6761 - 22433
http://armscollectors.com/srs/lookup_luger.php
As an example I did a search for a test Luger and serial numbers in their data base came up with this:
6761 - - 060103 - TRP B 6TH CAV -
7019 - - 020828 - OO (STOLEN) -
22433 - - 080610 - POWELL CTGE INDICATING DEVICE -
So, where is # 7019!!!
Ed