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<p>[QUOTE=&quot;coreya, post: 4485843, member: 915&quot;]They are mold marks used to id which mold they were produced in for quality control. there are thousands of different marks that were used depending on when they were made. The machines that were used had between 8 to 12 spots if my memory serves me correctly ( could be wrong) so 1-8 or 12 were used along with other markings. also higher numbers used as replacement molds when one became unusable. Ball was notorious for using molds till they couldn&#039;t be used any more.[/QUOTE]</p><p><br /></p>

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