From the picture you posted of the muzzles it appears that there is no evidence of steel "keels" in place under the ribs. This normally indicates cut barrels. If the barrels had been cut back from 32" to their present 30" by Parker Bros the keels would normally have been set back in place. I have not seen a set of barrels known to have been shortened by Parker Bros that did not have the keels in place.
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