I was doing a little research on the Corbin registered trademark X.LCR with the arrow through it, when I came across this interesting article. It’s pretty interesting in connecting Yale & Towne, Corbin Cabinet Lock, Eagle Lock, Bridgeport Lock and Excelsior Hardware. It is misstated that Eagle was located in New Britain, but the article has quite a bit of interesting information.

http://www.stamfordhistory.org/rg18.htm

Does anyone have any background on Corbin’s use of the X.LCR trade mark? When used, etc. I just got an old Corbin PT with the X.LCR and a patent date of 1909. It is incised with S.O.Co. I’m trying to support the theory that the lock is from the original Standard Oil Co. before the 1911 breakup…back in the days of J D Rockefeller.