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Old 21st November 2015, 09:30 PM   #6
A Senefelder
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Join Date: Jul 2009
Posts: 214
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I have no idea what this is but thought it odd that the two holes were punched from opposite sides, one punched front to back, one punched back to front ( as shown by the remnants of the cone created by driving a sharp implement through the metal ).
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