No. It letters from Mr. Conrad as a 12-gauge ordered June 1889 --
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It is the gun that went back to Parker Bros. for a set of 32-inch Vulcan Steel 20-gauge barrels, forearm and both sets of barrels got the 1910 bolt plate. I estimate that happening after 1919 as the rib legend on the Vulcan barrels is CT, U.S.A. and before 1926 as they don't have the PARKER BROS. OVERLOAD PROVED stamps.
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Any chance the recently acquired books might address the 20-gauge barrels?