PeteM:
Can't wait to read an article on your travels.
From what I can glean even as early as the 1920s folks knew very little about the composition and source of tubes stamped Armor, High-Pressure, Homo-Tensile, Nitro, Titanic, Vulcan, etc., but only that the names denoted different grades or recipes of steel. If I'm not mistaken all the aformentioned names were American steel types.
I think this just might be a little confusing as "LLH" and other Belgian tubes maker's marks on found on tubes with these names. But it seems that the stamps were applied here in the U.S. of A. and I wonder if we can sort out the tubes steel that was actually sourced here?
Drew: On the "Armor Steel" with "SB&Co. T" on the 1925 Long Range Field Grade, just from the pic it appears to me that "T" is a "F". Have you put a glass to the stamp? And on the 1909 12 bore with Armor Steel tubes the right tube appears to be stamped "EH".
I'm not exactly sure of the family relationship between William Burke Belknap, Belknap Hardware and Manufacturing Company, and William F. Belknap but I'm wondering if they weren't brothers being sons of Morris Burke Belknap?
(see page 28-29)
http://books.google.com/books?id=J30UAAA...nap&f=falseIn addition to being involved with iron & steel, the Belknap boys seems to have traveled back and forth between the U.S. of A. and Europe:
http://books.google.com/books?id=SMRNAAA...nap&f=falseKind Regards,
Raimey
rse