Nantucket Signals dates the flag from 1843 to the end of the vessel’s career. A painting of 1840–1850 whaling signals is also cited.
Daniel Webster was a Nantucket whaler in 1838–1857, subsequently sold to New Bedford. Owners named after 1838 include Jered Coffin, Henry A. Kelly and Zenas L. Adams; agents include Jered Coffin, French & Coffin, Benjamin Coffin and Adams.
Keep the explicit scope label independent; no alias or company identity is inferred.