Originally Posted By: Chukarman

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604 (serial number)

On the barrel: Crossed pistols under HAL and an unidentifiable stamp mark about 1/2" above the HAL mark

Rib marked Charles Daly Fine Damascus Barrels. Action flats marked PRUSSIA and 604 with an eagle and a U under a crown.
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Country of Origin Stamp "Prussia" should aide in the dating effort. I believe first the Country of Origin Stamp was Saxony; then Thuringia; and finally "Prussia" before they found their identity.

Cheers,

Raimey
rse