It looks like the auction was viewed over 800 times and only one person recognized the work.
Maybe in a week or two the rifle will show up on a dealers list at two or three times what he paid. And now that we are all aware that could make someone very happy.
Let the games begin

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Two or three times what he paid would still be a bargain in my book.
From reading the ATF web site, once an antique, always an antique. The Gun Control Law simply does not apply to it, unlike C&R eligible firearms, which are eligible for their special status only if they remain in the original condition.