Re: HP-67 with clear (transparent) back cover Message #3 Posted by Walter B on 14 Aug 2009, 10:18 a.m., in response to message #1 by Giovanni Jimenez
Buenas tardes / buon giorno Giovanni,
AFAIK these were demonstration units from times when CAD was not readily available. So you could see where some space was left.
HTH,
Walter
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