Is there a tube manufacturer primer out there somewhere? My father-in-law is a antiques dealer, dealing mostly with firearms and native american items. He travels around the country looking for different stuff, and is always interested in finding stuff for his daughters and their husbands (he enjoys the hunt and loves getting a good deal) When I saw him last, I mentioned that if he should see any tubes to go ahead and pick them up. Well, he's back from his latest trek and says he's got a bunch of different tubes (he thinks I'm crazy for wanting this stuff, but he's happy enough to go searching for them). I'm picking them up today, but I have a feeling I won't know what I have, especailly due to the different branding of tubes by companies using the same manufacturer. Is there a place I can go to (or a book I can get) that outlines tubes, specific markings by different manufacturers, etc?