We have a winner, found the AEW match;
Congrats to the 2 above researchers, it is silver & a famous bit at that!
Andrew Ellicott Warner, born 27 Nov 1786, died 1870
Normally yes, but even the same silversmith would stamp them all different directions. Seen it many times, but I have no reason why. Seen many up-side-down.
To the OP there is no need to test it (Normally a destructive method) or clean it. There is no speculation when IDing silver that came from the ground, trust me I can tell it a million miles away. Silver-smiths did not hallmark silver plate in this manner. It SCREAMS silver to me, I dig a lot of it.![]()
FoundinNC nailed it. It appears that this is a terrific historic piece related to Maryland's history. The second hallmark is from the coat of arms of George Calvert, the first Lord Baltimore. (What do you think Bill D?) The Calvert family coat of arms was later used for the design of the well-known state flag of Maryland. If indeed the OP's piece was manufactured in 1802, it would have been a very early piece by Andrew Ellicott Warner (1786-1870). IMO this looks like a banner- quality find.
Flag History
I agree Tea Caddy Box plate is most likely.
I really think the right Museum or collector needs to be found next.
If were Captain Jack Aubrey I would say "An extra ration of rum for Cru".
Also, that makes sense as a Tea Caddy because that stuff was like gold at that time.
now let's work on the initials on the front...who did it belong to?
Its a long shot as its only 1 letter, a 'H', so one would have to assume the family surname, which will not narrow the search very much. Although, we do know the time-frame & if a prominent family H lived nearby you at least can speculate with a reasonable level of probability.