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Unread 06-04-2018, 09:32 PM   #67
Lyn Islaub
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Location: Phoenix, AZ
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Glenn,
Being a new member, you wouldn't likely be aware of the fact that our good friend Frank Manders, who initiated this study, has passed away . I do not know if any of the other members had continued his study of 'G' date proof marks.
Lyn
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