New numbering system: First letter = month; second letter = year. I and O skipped to avoid confusion with one and zero.
- 1965 - AA00000…
- 1966 -AB00000…
- 1967 -AC00000…
- 1968 - AD00000…
- 1969 -AE00000…
- 1970 - AF00000…
- 1971 - AG00000…
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New numbering system: First letter = month; second letter = year. I and O skipped to avoid confusion with one and zero.
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