YALE7750 wroteI think the key is older than the lock in that listing; I remember reading an old pamphlet printed by Yale & Towne that mentioned the replacement of the old Y&T logo on keys & cylinders with the all-uppercase YALE logo in a square border being sometime around 1904. Various other lock makers copied the logo in a border & ended up being sued by Yale & Towne for trademark infringement. Before that, keys had the Y&T logo and “Yale Paracentric” like the one in the picture. The earliest paracentric keys had the trefoil bow, same as the old “Yale corrugated” versions.
The USFS was established in 1905, which would make that one of the earliest examples of the USFS padlock key. Definitely a cool find.
Here is an enlarged image of the Yale No. 8 key blank taken from the Supplee Hardware Company catalog page 86 ca. 1902 that has been cited here previously, see thumbnail attached. I was interested in the patent dates incised on the key blade: Nov. 2, 1892, July 28, 1892 and Aug. 11, 1891, with some diligence I did find two:
July 28, 1892, U.S. Patent 456,917
Aug. 11, 1892, U.S. Patent 457,753
Both the above were issued to Warren H. Taylor and assigned to Yale & Towne Mfg. Co. I was unable to find anything whatever on the Nov. 2, 1892 patent. Anybody out there that can find this one?
Pete Schifferli
[unknown]
