Two marks on a recent "new2me" Tobin SxS 12GA prompt two questions.
This firearm is marked TOBIN ARMS (all capital letters - no geograhic location) on both lockplates, serial number is 191XX, and I believe was assembled by G.B. Crandall during the 1920s-30s and retailed from his Woodstock Ontario Canada gun shop.
Under the pull-off forearm both barrels exhibit what I believe is the barrel maker's mark - BTP (all capital letters). The T is taller than the B and P, and the horizontal bar of the T partially over-towers the B and P.
Who is the barrel maker BTP?
The barrel steel on top is marked - DE MOYA FLUID STEEL (all capital letters). Is "Tobin" the only maker who used this brand name of barrel steel, or does this marking show up on other marques?
With thanks in advance for any help.