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In some cases, the grade gives some clues. Xtras haven't been made | In some cases, the grade gives some clues. Xtras haven't been made | ||
since the 1930's, for instance, and the Century was first introduced | since the 1930's, for instance (the line discontinued in 1937), and the Century was first introduced | ||
some time in the 1960's or 1970's as I recall, from what scant literature | some time in the 1960's or 1970's as I recall, from what scant literature | ||
I've been able to acquire. GBD introduced new shapes and dropped shapes | I've been able to acquire. GBD introduced new shapes and dropped shapes |
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