| COMMERCIAL 1918-1960 The first year of commercial plates was 1918. |  |
| 1918 - 1938 |
1918 •  |
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| 1919 |
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| The use of the "X" prefix began in 1920, and continues today. |
| 1920 |
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| 1921 • |
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| 1922 |
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| 1923 |
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| 1924 |
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| 1924 |
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| The "A" suffix was only used in 1924. 7-digit plates were used from 1925-1930. |
| 1925 |
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| 1925 |
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| 1926 |
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| 1926 |
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| 1927 |
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| 1927 |
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| 1928 |
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| 1928 • |
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| 1929 |
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| 1929 • |
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| 1930 |
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| 1930 |
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| Starting in 1931, the 1/X prefix was used for numbers over X99999. |
| 1931 • |
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| 1931 • |
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| 1931 |
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| 1932 |
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| 1933 |
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| 1933 |
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| 1934 |
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| 1935 |
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| 1935 • |
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| 1936 |
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| 1937 |
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| 1937 |
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| 1938 |
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| 1938 |
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| 1939 - 1951 |
| 1939 started the era of small plates with a stacked X/A prefix. |
| 1939 |
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| 1940 |
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| 1941 |
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| 1942 |
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| 1943 |
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| 1944 |
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| 1945 |
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| 1945 |
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| 1946 |
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| 1947 |
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| 1947 |
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| 1948 |
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| 1949 |
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| 1950 |
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| 1951 |
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| 1951 |
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| 1952 BASE | X/A A100 - X/N Z999 (?) |
| The 1952 plates were multi-year, starting with the X/A prefix and going to X/Z 9999. Once X/Z 9999 was reached, the pattern changed to X/A A100. |
| 1952 |
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| 1953 • |
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| 1954 • |
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| 1955 |
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| 1956 |
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| 1957 |
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| 1958 |
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| 1959 |
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| 1960 • |
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| 1960 |
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| Highest number known on this base is X/N J428. |
| 1957 BASE |
| In 1957, the plates were re-sized to 6 x 12 inches and the numbering continued from the 1952 base starting at X/O A100. |
| 1957 |
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| 1957 |
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| 1958 |
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| 1959 |
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| 1959 • |
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| 1960 |
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| In late 1959, a few commercial plates were made with the "N. J." on the bottom, with new thinner dies like the upcoming tan commercial base. They were also made of aluminum, whereas the earlier plates were steel. The steel plates with the stacked NJ may have stopped at X/V Z999, making the new dies aluminum plates start at X/W A100. |
| 1960 |
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| 1960 |
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| 1960 |
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| 1960 • |
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| Highest number known on this base is X/X K215. |