.735 would be the medium-high side of post 1895 12 gauge Parkers. It is way too small to be one of the earlier guns. Austin Hogan and I have both measured more than a few original appearing, apparently unmolested Parkers, especially single barrels, that are bigger than the nominal .729 or .730, some as big as the very high thirties. Remember, even if this gun had been honed from .729 to .735, wall thickness would only change by .003.
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