The shape of the entry is hard to see on your photo but it appears to have a moderate clipper bow. The gun port inspired paint job was common on merchantmen of the time. Not sure how common it was to paint the loft models. Nine clipper ships were launched from Bath between 1852 and 1859 and ported farther south along the New England coast. They were the Carrier Pigeon, Undaunted, Maid of the Sea, Monsoon, Emerald Isle, Flying Dragon, Viking, Winward and Mary Robinson. The Roebuck was built in Kennebunk. Your loft model could be anyone of those but hard to tell without more details.
Example of the genre:
In reference to scale, the largest ship launched in 1853 was the Great Republic, 325’ on deck, beam 53’, depth of hold 39’, tonnage per register 4500.