Can anyone interpret the date on this fly wheel?
http://i.ebayimg.com/06/!BUB604gBGk~$(KGrHgoH-D8EjlLlyV52BKLc31jCsg~~_1.JPG
Seller says Dec 7 1958, what's the extra "1" by the pin?
Thanks
Steve
http://i.ebayimg.com/06/!BUB604gBGk~$(KGrHgoH-D8EjlLlyV52BKLc31jCsg~~_1.JPG
Seller says Dec 7 1958, what's the extra "1" by the pin?

Thanks
Steve
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