Rabbit, There were damascus barrel makers in America, but very few...relatively none, when compared to Europe and England...during the hey-day of American double production it seems as though not one American damascus maker could not compete with the Europeans makers in both numbers or cost..American makers chose the fluid steel alternative, as the Europeans eventually did.
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Didn't all heavy industry, in Liege, crash during WWI or WWII, or was Liege spared?
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Although I have no saved proof to offer, I was told, that after WW II, a few Val Trumpia gunsmiths (desparate consumers of Liege forgings) bought out Manufacture Liegeois's drop forges, dies, or fixtures. Shortly afterwards, the Val Trumpia double shotgun production numbers climbed like never before while the Liege smiths re-tooled.
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If the Liege sporting gun industry wasn't interrupted during WW II, why then would the Italian gunsmiths be so desparate as to buy their tooling?