I have a Nov 65 San Jose built Mustang. My original leaf markings are as follows:
C4ZA5556S
295E5
That would be the 295 day of the yr = Oct 22nd 1965.
original to a Nov '65 Mustang.
What is interesting the Eaton "E" comes before the year "5" rather than after in most all other cases.
Both of my springs are stamped the same.
This San Jose car has a yellow 1-inch brushed daub, immediately below the stamped markings,followed by a green brushed daub the same size. Daubs in no way look sprayed on.
Ray