J154 is dated 1833, 1837 and 1841; the second flag J155 is dated 1845 and appears in the 1840–1850 watercolour.
John Adams 1 is dated 1812–1849, with numerous unknown or illegible owners. Named entries include ? Barnard, Griffin Barney and Charles F. Gardner. Agents included Barnard & Macy, Silvanus Ewer, Griffin Barney, David Joy and Francis B. Folger. The disposal entry is unknown and its year is written 1949.
Keep the explicit scope label independent; no alias or company identity is inferred.