Nantucket Signals illustrates N628, but the vessel account gives N630 with a full border for 1838 and a border at top, bottom and fly, corresponding to N629, for 1842. Its displayed N628 remains unexplained.
Napoleon operated from Nantucket from 1838 under George B. Upton, later John W. Barrett in 1851, and was sold to New Bedford about 1854. Agents progressed from Upton to Barrett & Upton and J.W. Barrett & Sons; some ownership entries are unknown or illegible.
Keep the explicit scope label independent; no alias or company identity is inferred.