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If i am reading the book right 1937 Knucklehead cylinders would have the 1-35 and 1-352 pressed in . Not raised . On the tag there would be a letter for the month A-M with no I. Then day of the month one or two numbers. No year code. Would the date tag on the base with the month/ day be on the same spot as the 1936 cylinders raised 1-35 /1-352 or the same place as the 1938 1939 with the stamped 1-35 1-352.Have you ever seen 1937 cylinders like this.
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