Serial Guide

Serial ranges are approximate and should be used as a rough guide for dating

Reference Production Period Approx. Serial Range
79221954244xxx–288xxx
79231955217xxx–218xxx
79241958–1959273xxx–293xxx
79281959–1968305xxx–598xxx
7016/01968–1975621xxx–827xxx
7021/01969–197170xxxx–76xxxx
940 series*1975–1984845xxx–107xxx
941 series*1975–1984798xxx–94xxxx
761001984–198564xxx–23xxxx
790901989–1995300xxx–B6xxxxx

* Serial numbers reset around this time

Serial Year Serial Year
29xxxx195878xxxx1972
30xxxx195981xxxx1973
32xxxx196082xxxx1974
33xxxx196184xxxx1975
37xxxx196288xxxx1976
40xxxx196389xxxx1977
43xxxx196490xxxx1978
50xxxx196591xxxx1979
57xxxx196693xxxx1980
59xxxx196795xxxx1981
62xxx196897xxxx1982
73xxxx196998xxxx1983
74xxxx197099xxxx1984
75xxxx1971Serial Restart1985