Provincial, et al,
Harrold Tool Company of Columbiana OH, seems an under-researched (or under-reported) manufacturer. AA has nothing. Twertsy has a few paragraphs on TA. Vintage Machinery mentions it because of family connections with Crescent Machine Company (NOT Crescent wrenches).
Whatever its earlier incarnations, HTC was founded as a maker of hand tools by brothers Samuel Harrold (29Aug1850-20Mar1924) and (Rev) Albert W Harrold (18May1860-13Sep1939). As noted in some sources, HTC ended up purchased by the Budd Co.
The pliers are rather pedestrian and apparently inexpensively made and finished, not graceful, innovative (though their brothers Amos and Elmer have no less than 14 patents featured on DATAMP!) or ergonomic, perhaps why they’ve drawn so little attention. But I have to say, there is SOMETHING aesthetic in their very economy and adherence to SIMPLICITY.
The Harrold family seems to have been Church of the Brethren (Albert was ordained 31Oct1903), but Samuel’s wife Nancy (nee Culp, who lived past her 100th birthday) was Mennonite, and he is buried in a Mennonite cemetery.
...By way of observing that there’s more detailed information available about the Harrold family than the tool company.