No period of use is specified. The painted source also assigns this flag to Columbia.
This version comes from a painting of Nantucket whaling signals dated 1840–1850.
Constitution operated from Nantucket from 1821 and was broken up in 1856. Owners included ? Coffin, Charles G. Coffin and, in 1839, Richard Mitchell, with several gaps. Zenas Coffin was agent in 1821 and Charles G. Coffin during 1831–1852.
Keep the explicit scope label independent; no alias or company identity is inferred.