1950 and earlier parts are stamped with a MM DD Y sequence where MM=Month, DD=Day, Y is a letter indicating the year.
1951 and later parts are stamped with a sequence consisting of 1 alpha character and 2 numeric digits.
The alpha character is the year where:
1949=H*, 1950=I*, 1951=J, 1952=K, 1953=L, 1954=M, 1955=N, 1956=P, 1957=S, 1958=T, 1959=U, 1960=V, 1961=W, 1962=X, 1963=Z, 1964=A, 1965-B, 1966=C, 1967=D
O, Q, R, and Y were not used.
The numeric characters are the week of the year.
Examples:
M 05 would be the 5th week of 1954.
07 26 H would be the 26th of July, 1949.
* H & I are unverified

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