A rifle on this website has a lock that is marked with something like "Truitt Bros Warranted". The second edition of Sellers' "American Gunsmiths" compendium indicates that the Truitt Brothers company appears in Philadelphia business directory listings from 1847 to 1861. Here are the listings I could find.
The next two images show the cover and a listing for two Truitt-related hardware entities in the 1846 edition of "McElroy's Philadelphia Directory". One of the addresses listed for both entities is "169 High".
The next two images show the cover and a listing for two Truitt-related hardware entities in the 1847 edition of "McElroy's Philadelphia Directory". One of the addresses listed for both entities is "169 High".
The next two images show the cover and a "TRUITT, BROTHER & CO., hardware" listing in the 1852 edition of "McElroy's Philadelphia Directory". One of the addresses listed is "169 High".
The next two images show the cover and a "TRUITT, BROTHER & CO., hardware" listing in the 1855 edition of "McElroy's Philadelphia Directory". One of the addresses listed is "169 High".
L. Dietle