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Old 04-05-2016, 11:42 PM
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Steve Lindsay Steve Lindsay is offline
Join Date: Feb 2006
Location: Kearney, NE
Posts: 3,995
Default Re: Antique engraving question

John, It looks like diamond drag done with a pantograph or maybe spinning D bit in the same type of pantograph. Yes, it will go over a slight curved surface and were around back then.
Steve Lindsay
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