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*When 5 digits occur, the meaning of the 4 first remain the same. | *When 5 digits occur, the meaning of the 4 first remain the same. | ||
*Some sources such as the Pipephil portal, indicate this change in markings occurred in mid-1976, others indicate it was 1974. | *Some sources such as the Pipephil portal, indicate this change in markings occurred in mid-1976, others indicate it was 1974. | ||
*Eventually the stem can be curved (bent), without altering the classification (1= tapered, 2= saddle). | |||
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