The painted flag is not listed for Columbia in Nantucket Signals. Since the Coffins had their own house flag, Rosanoski suggests it might belong to another owner; the same design is also allocated to Constitution, another Coffin vessel.
Columbia is recorded as a Nantucket whaler under the Coffins in 1841, 1846, 1850 and 1859.
Keep the explicit scope label independent; no alias or company identity is inferred.