We have a lot of 3 vintage keys all marked "C493" on one side, 2 of them marked "Corbin Cabinet Lock Co New Britain Conn". They appear that they may be the same key. They measure about 1 5/8" in length x about 3/4" across the top round center. They all have some tarnish on them.
Lot of 3 Vintage Keys
I will ship internationally, please contact me with your country for a shipping quote.