Jim,
there is excellent advise on this thread. There are some good books out there that contain information about the navy Luger. The best of the lot is Jan Stills. "Lugers at Random" by Kenyon is pretty good too. Suppliment that with a lot of past postings here on this forum. There's some good stuff here. Try to get out and see some navy (P-04's) Lugers. When you think you have it all, then take advantage of TomA's offer and call him, if you want. There is just too much for him to cover with just one phone call. There are just too many expensive fakes out there for you to get hung up on. You just have to get out there and physically see some too. There is ground work that you should do first before calling people.
Watch some of the internet sites. Doug Smiths web site for FGS is good and so is Simpsons. Both guys have pretty good lists of guns with pictures. Challenge yourself by trying to figure out why one gun sells for more money than the theoretically same gun on the next line of the same web site.
Enough preaching for now.
Big Norm
