My old shooter '03 has a rod bayonet stock. Under the buttplate, the number 5512 is stamped. Could this possibly have been the serial number of the original receiver? It has one of the early ground down Krag buttplates with matching asssembly numbers on the plate and cover. Unfortunately, the cartouche is long gone so I don't know what year it is actually from. A few pictures will help explain what I have. Thanks.

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