Style 3: W4D14008 (Only used from 1980 – 1984)
Description: Eight (8) character serial number begins with one (1) letter followed by one (1) numerical digit and then another letter digit and ends with five (5) numerical digits.
Month of manufacture is 1st digit of the serial number. (See chart below).
Year of manufacture 2nd digit of the serial number. (See chart below).