VARIATIONS
1958: Type 1 - Low slogan, short slots 1 - 2895
Type 2 - High slogan, long slots 3009 - 3192 (184 P)
1961: Type 1 - Hyphen on 4-digits 1 - 3-750
Type 2 - No hyphen on 4-digits 3751 - 4000 (250 P)
1963: Type 1 - Hyphen on 4-digits 1 - 4-238
Type 2 - No hyphen on 4-digits 4498 -
1976: Type 1 - Aluminum, short slots A001 - D675 (3,672 P)
Type 2 - Steel, long slots E001 - W875 (8,631 P)
1979: Type 1 - Short slots, no hyphen AA01 - AV90 (1,872 P)
Type 2 - Short slots, with hyphen AX-13 - EZ-89,
DC-09, FH-56, HE-95, MA-71
Type 3 - Bolt holes, with hyphen JC-17 - JZ-63 (2,027 P)
1980: Type 1 - Dated "80", short slots
AA-01 - JY-50, NA-46 - TW-97, XC-31 - XH-79,
DH-17, FY-79, HF-40, MH-99, WM-47
(81) Type 2 - Undated, long slots KA-50 - LS-66,
DL-91, HH-55, MJ-10 - ML-80, WP-22 (4,051 P)
1990: "B" stickers issued to renew "MAR" and "90" "A" stickers,
which are merely 1989 non-staggered stickers.
