The flag is dated 1844 and appears in the 1840–1850 watercolour.
Henry Clay’s Nantucket career is dated 1838–1847, or from 1839 in Nantucket Signals. Christopher Wyer owned her in 1844 and Mathew Starbuck in 1847; Wyer acted as agent throughout. She was condemned about 1847.
Keep the explicit scope label independent; no alias or company identity is inferred.