VARIATIONS
1911: 1-4-digits have vertical bars adjacent to slots,
5-digits have vertical bars further away from slots.
1915: Late issues cardboard E456 (Emergency).
1916: Type 1 - Square holes in "9" and "6" of date 73 - 36923
Type 2 - Vertical rectangular holes in date 38546 - 63207
Late issues cardboard T54 - T744 (Temporary) valid until July 1,
replaced by matching Type 2 plate (i.e. T744 = 39744).
1917: Type 1 - Non-serif "1" 2167 - 13544
Type 2 - Serif "1" 36217 - 76718
1918: 6-digit has non-serif "1", thinner date band with "1.918",
not ".1918".
1919: 6-digit has thinner dies and date band.
Heavy or light steel reported.
1920: Type 1 - Small, rounded "ONT 1920" 2076 - 66060
Type 2 - Large, squared "ONT 1920" 80911 - 161779
1924: Type 1 - Square 1923 dies 9-856 - 98-827 (88,972 P)
Type 2 - Round 1924 dies 102-491 - 312-177 (209,687 P)
1930: Type 1 - Close slots, dot hyphen
B-978 - N-9155, AN-462 - FX-130
Type 2 - Far slots, square hyphen
O-1050 - Y-6270, HP-702 - PU-250
1931: Type 1 - Far slots, over "NT" and "9" on 4-figure,
square hyphen B-333 - J-846, BM-19 - FB-2
Far slots, over "O" and "31" on 5-figure,
square hyphen A-9119 - K-8497, AP-410 - ET-157
Type 2 - Close slots, over "T" and "1" on 4-figure,
round hyphen P-156 - W-502, LC-6 - LO-60
Close slots, over "N" and "9" on figure,
round hyphen R-3225 - Y-1995, HZ-400 - OS-795
1936: Type 1 - 5 1/2" x 10" or 12" A-1 - OH-778
Type 2 - 5 3/4" x 10" or 12 3/8" OR-530 - PK-402 (16,856)
1938: Type 1 - 1938 dies 1A1 - 480Z9
Type 2 - 1939 dies 778Z3 - 999Z9, A1 - C4635 (26,850)
1943: Type 1 - New plate 1A1 - 282Z4, H2308
Type 2 - Restamped from 1942 H4538 - H7517, J1832 - J9728,
K1531 - K9383, L1049 - L6012,
4827S
1952: Windshield stickers have plain 6-digit serial, or serial matching
plate number (seen only on 2-letter suffix series so far).
1958: Type 1 - Old legend with pointed "A" of "ONTARIO", larger
1953-57 crown 1000 - J-15597
Type 2 - New legend with flat-topped "A" of "ONTARIO",
smaller 1959-61 crown J-50606 - J-82229 (31,624 P)
1972: Type 1 - Large 1968-71 crown, light steel, blue back
10-00 - 734-07R (2,655,408 P)
Type 2 - Small 1973 crown, heavy steel, white back
777-69R - 997-62R, R2-455 - R10-888 (30,428 P)
Type ? - Small 1973 crown reported in light steel also
1973-81 BASE
1973 Type 1 - Dated "73", white back AAA-001 - HYZ-455 (3,469,982)
1974 Type 2 - Dated "73", blue back JCH-110 - JEJ-004 (45,849)
(HZE - JFA reported)
1975 Type 1a JHL-921 - LHP-928 (1,029,977)
1976 Type 2a LKF-266 - NKJ-999 (922,811)
1978 Type 3 - Undated, blue back NKK-001 - SOR-634 (1,949,683)
1981 Type 4 - Undated, white back SRC-582 - TMA-999 (390,028)
OTHER MINOR VARIATIONS 1973-ON
Various dies exist for letters B,C,H,K,M,Z.
Serif "J" die used for WHJ, WJA-WJJ only. (WEJ reported)
Types 4-5: Some have black, yellow, green or red back.
Some have longer sticker box. (SYY-TJA mixed)
Kiosk-issued stickers have slight differences 1993-98.
2006: "SEP" now printed as "SEPT".
