Re: Little research among HP-35 owners :-) Message #7 Posted by Michael on 20 Mar 2006, 5:01 a.m., in response to message #1 by Michael
After an investigation I have found references to 2-4 still existing HP 35 Red Dot calculators in every thousand of serial numbers. But no Red Dot was found from 03770 up. I have found various references on the web, but the total number of known Red Dots I've found is only 14. Therefore there are too few data for an accurate statement, but a question arises whether the total number of ever produced HP 35 Red Dot could be higher than 4000. There are even a few HP 35's, which have Red Dot S/N, but in fact are versions 2 or higher. IMO those calculators changed from Red Dot to version 2 during some service repair. Another interesting fact is that among still existing Red Dots many have not the 2.02 ln e^x bug. More data would be appreciated, but due to the rareness of the version 1 it's a very difficult task.
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