Edwardian, I am most familiar with the law.
The gun is 1893 vintage, and I had a certificate from the maker plus a copy of the ledger. It was also declared as antique firearm in the paperwork.
Per the local agent, it was an issue of declared value triggering a "formal entry" process, and not a tariff related issue, or ATF.
However, something leads me to believe that she simply did not want to clear a firearm herself to an individual, antique or no antique.
BTW, I have a C&R and they liked seeing it, but that did not solve the problem, and it really should not have anyways.
I have imported an antique Purdey DR before and that went just fine.
On the other extreme, I also imported a modern H&H DR from Australia with the proper import paperwork, and through the post office. This thing actually showed up at my door... Go figure...
best regards,
WC-
P.S> google the "formal entry" process, and you'll see the rigamarole involved. I know what the declared value will be next time.