Hi Rand.
Let me talk some nonsense.
Maybe trying a different aproach, by re focusing the eyes on the piece.
Why not the barrel having being made at an early stage, for flint or miquelete action, and later mounted on a new stock, with a percussion made lock coming with it. This would explain the decoration on the barrel being different than on the lock and tab, as also giving a more plausible date for both lock and barrel.
Fernando
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