What was advertised in a colonial American newspaper 250 years ago today?

“McLean is now at Work on a Watch, the whole of which will be finished in the Province, except the Two Plates and Cases.”
During the imperial crisis that led to the American Revolution many advertisers encouraged prospective customers to purchase goods produced in the colonies, launching the first wave of “Buy American” campaigns even before declaring independence. Some colonists expressed concerns about an imbalance of trade with Britain, a situation exacerbated by the taxes imposed on paper, glass, lead, paint, and tea by the Townshend Acts in the late 1760s. To remedy the trade imbalance, many colonists vowed to encourage “domestic manufactures” to strengthen local economies. Producing goods in the colonies created jobs while simultaneously providing alternative products for consumers to purchase. The nonimportation agreements adopted in response to the Townshend Acts made domestic manufactures even more important. Advertisers increasingly called on prospective customers to give preference to goods produced in the colonies.
John McLean, a “Movement Maker, & Watch Finisher,” joined that movement, at least as much as he was able. In an advertisement that ran in the October 23, 1769, edition of the Boston-Gazette, McLean informed readers that he was “now at Work on a Watch, the whole of which will be finished in the Province, except the Two Plates and Cases.” Many American watchmakers did not actually make watches in the colonial era. Instead, they imported and sold watches and repaired watches, but the production of watches took place in London, Dublin, and other cities on the far side of the Atlantic. Given the constraints on constructing watches in the colonies, McLean made his best effort to support the American cause by making domestic manufactures available to consumers. His watches were not exclusively American products, but he suggested to customers that a significant portion of their production did indeed take place in Massachusetts, making them more desirable than imported watches.
McLean did not need to make his pitch any more explicitly. Other items in the Boston-Gazette provided context for readers to interpret his advertisement, as did public discourse more generally. The October 23 edition commenced with “A LIST of the Names of those who have AUDACIOUSLY counteracted the UNITED SENTIMENTS of the BODY of Merchants throughout NORTH-AMERICA, by importing British Goods contrary to the Agreement.” Another advertisement on the same page as McLean’s notice emphasized “North-American Manufactures” available at a shop located “Opposite LIBERTY TREE.” Readers knew how to interpret McLean’s pronouncement about working on a watch constructed primarily “in the Province.” They understood the politics he deployed to market his product.