I think you can forget that one. Date codes tend to be a manufacturer's "internal" code. A very common 4-digit date code format is WWYY where WW is the week from 01 to 52 and YY is the last two digits of the year. That means, a la DOS, we can't tell the difference in a cap made in 1905 and 2005!
I think you can forget that one. Date codes tend to be a manufacturer's "internal" code. A very common 4-digit date code format is WWYY where WW is the week from 01 to 52 and YY is the last two digits of the year. That means, a la DOS, we can't tell the difference in a cap made in 1905 and 2005!