Guillermo Message #1 Posted by Raul Lion on 26 May 2004, 4:53 p.m.
what about the serial number of your 41C?(http://www14.brinkster.com/planetatierra/detalle.asp?id=39)
it is lower than the earliest serial number listed here in MoHPC and seems to be a 1977 calculator (?)
Raul
Edited: 26 May 2004, 4:54 p.m.
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