These showed up with a stash of '66 Pontiac Le Mans parts dumped at local yard. Sure don't look like first gen A body hood hinges. Have Atwood Manf stamp on them, Rockford, Ill. Some kind of RV hinge?? Certainly clean are blasted like the Le Mans front fenders and skirts were. A google search of Atwood turned up a history of a metal fabricator, started out with vacuum cleaners, then branched out into all kinds of metal products, including hood hinges.
Could this be them: https://www.dometic.com/en-us/us/rebranded/atwood https://history.rockfordpubliclibrary.org/localhistory/?tag=atwood-industries UticaGeoff
That is them. They (Atwood) was apparently purchased by Dura Industries in the early 00's, according to an internet search. Those employment trends listed - 1980 v. 2005 sure do not look promising.