Just a quick note to try to get up to speed on this thread, but if you want to glean a bit of info follow the thread here,
http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=152744&page=6 , and note the Krupp composition on Heym's site on the last post. I think that the Krupp stamp noted a recipe, albeit a time varying one. Axel seems to indicate that research centered around tube composition is futile and if the solution goes to zero, so be it. But I still contend there is something to it. Without centrifuging a sample of the tube in question, one would have to date the longarm and hope that the tubes were made during the finite period the longarm was completed. As of late there has been some focus on German longarms assembled just after WWII. Somewhere between 1950 and 1953 raw material were very low and makers made do. It seems that any thing that could be considered surplus was used or converted for the effort. Stamps were used and tossed when a poor mark was the result. They seem to vary depending on the source so there will be variations in the letter type on the same type of steel. Also it appears that Krupp was sourced by many so depending in what country the tube maker might reside, might result in a variation in all.
Drew if theose stamps are Cavemen just forward of the flats on that Tobin, I'd really like a closer look.
Kind Regards,
Raimey
rse
