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HP-35 Version 1- Red Dot |
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The HP-35 was HP's first
pocket calculator. It was introduced in the year 1972, at that time
most
calculators (including expensive desktop models) had only the four
basic
functions.The HP-35 was the first pocket calculator with transcendental
functions and the first with RPN. The desing of the HP-35 was slightly
modified during the production time, therefore this calculator
was subsequently developed to four versions. The first HP-35 - version
1 -was the earliest and only production version that had a red dot to
the right of the power switch that showed when it is turned on.
There are a few more HP 35 Red Dot signs, the main is the
serial number label placed between the lower pads and the serial number
should be typed in a narrow silver region. All but two HP 35 Red
Dots in this table have this feature. The two different ones (S/N
1143A 03288 and 1230A 89591) have several other features
from higher versions, therefore there were either substantially repaired
or rebuilt from spare parts.
The HP 35 Red Dot version is very rare. Most of them are in the hands of calculator collectors already.
HP-35 Red Dot calculators have serial numbers 1143A XXXXX, with a few exceptions. No Red Dot was found from 04281 up. From the collected data in this table follows that the total number of HP 35 Red Dots was greater or equal 4281 and less than 4813.
There exist a few HP-35's, which have Red Dot S/N, but in fact are versions 2 or higher.Those calculators changed from Red Dot to version 2 during some service repair.
Among still existing Red Dots presented in this table many have not the 2.02 ln e^x bug.. They were returned to the service for a guarantee repair after the BUG discovery,
The HP 35 Red Dot version is very rare. Most of them are in the hands of calculator collectors already.
HP-35 Red Dot calculators have serial numbers 1143A XXXXX, with a few exceptions. No Red Dot was found from 04281 up. From the collected data in this table follows that the total number of HP 35 Red Dots was greater or equal 4281 and less than 4813.
There exist a few HP-35's, which have Red Dot S/N, but in fact are versions 2 or higher.Those calculators changed from Red Dot to version 2 during some service repair.
Among still existing Red Dots presented in this table many have not the 2.02 ln e^x bug.. They were returned to the service for a guarantee repair after the BUG discovery,
In
this database are listed most of known and still existing HP 35 Red
Dots.
