Dreamlike 1860s Tintype Photo Tall Ship with Sailors on Deck - Civil War Related?

Dreamlike 1860s Tintype Photo Tall Ship with Sailors on Deck - Civil War Related?

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$225.00
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Anonymous, original tintype, 5.75" x 4.5", showing an
unidentified docked ship, with sailors visible on deck.
Part of an 1860s style frame is visible.. possibly a
Civil War related ship but I don't recognize it.

It's in very good condition with a couple of very light
bends in the bottom-right, and bottom center. The diagonal
line between the K and M in my watermark is NOT a bend.