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HP Forum Archive 19

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HP-35 Bug: highest serial number?
Message #1 Posted by Mark Henderson on 23 Feb 2010, 2:55 p.m.

Any ideas what the highest serial number got to for the HP-35s with The Bug? Were they all 1143s or did some 1230s also get it?

      
Re: HP-35 Bug: highest serial number?
Message #2 Posted by Michael de Estrada on 23 Feb 2010, 6:53 p.m.,
in response to message #1 by Mark Henderson

I have a late version 2 (S/N inside battery compartment) 1249A08206 with "the bug".

            
Re: HP-35 Bug: highest serial number?
Message #3 Posted by Mark Henderson on 23 Feb 2010, 7:34 p.m.,
in response to message #2 by Michael de Estrada

Wow, that seems like a lot of units - we know the "week code" (1249 etc.") really wasn't the production week, but I guess the rest of the number couldn't be sequential, either? MoHPC and some other sources describe 20,000 - 25,000 original "buggy" units, but a quick look shows buggy units with S/Ns 1143Axxxxx, 1230A8xxxx, 1230A9xxxx, and your high numbered 1249A. Were the last 5 digits then really only recording a few thousand units? Interesting!?!

                  
Re: HP-35 Bug: highest serial number?
Message #4 Posted by Matthias Wehrli on 24 Feb 2010, 11:21 a.m.,
in response to message #3 by Mark Henderson

Without any doubt on the unit of Michael de Estrada: It is very easy to exchange the mainboard of a non-bug unit with a bugy one or am I wrong?

                        
Re: HP-35 Bug: highest serial number?
Message #5 Posted by Michael de Estrada on 24 Feb 2010, 11:59 a.m.,
in response to message #4 by Matthias Wehrli

That scenario seems a little far fetched to me. Certainly, I didn't do this and I don't believe the prior owner did either. The calculator showed no evidence of being opened (intact original back label) and the front of the calc has all version 2 indicators (bump on 5 key, front label w/o 35). Unlike a Red Dot, where a fake might have great value, I don't think there's much to be gained by deliberately creating a buggy version 2. I have seen strange inconsistencies in serial numbers on other calculators, so I wouldn't put too much stock on that factor in this case.

            
Re: HP-35 Bug: highest serial number?
Message #6 Posted by tomdrewski on 25 Feb 2010, 2:00 p.m.,
in response to message #2 by Michael de Estrada

Quote:
I have a late version 2 (S/N inside battery compartment) 1249A08206 with "the bug".

ditto. 1249A00373


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