How to read the date code:
The 1st digit is the year -> 9 = 1969
The Letter is the month -> D = April
The remaining is the day -> 18 = 18th day of month
The letter 'I' was NOT used for a month
Input your query into the appropriate box. (year in the year box, etc)
Or for a list of all the codes just hit the Submit button.
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