I was in a watch shop the other day and saw a ball pocket watch. I was told it was a Ball 999P with sapphire pallets, in a Philadelphia Watch company case. The watch was size 16 and was suppose to be from 1930.

Any thoughts?


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Skip, I stumbled upon this a while back, it explains all.

Hamilton Ball Serial Numbers & Grade Descriptions

Thank you so much Lorne, Big help,

Thank you.

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