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Got my HP-28S year 1991 week 46 made in Singapure
08-25-2014, 10:19 PM
Post: #1
Got my HP-28S year 1991 week 46 made in Singapure
While working at OPorto city this week, I got my new acquisition: a used mint HP-28S, complete with barely used guides and original box, all for an excellent price.

Amazingly while browsing the Manual de Referência (Reference Guide) a small leaflet felt down on the floor.
This leaflet is about 14cm x 10cm, is an WARNING written in red, in Portuguese and in Spanish languages, calling the owners attention to the tropical climate, that can easily cause battery leakage, resulting in calculator damage not covered by HP warranty terms, except when local legislation exists that tells otherwise.

The guides are written in Portuguese and were printed in Brazil in 6/90.
In fact the inner included reply card destination address is:
EDISA Informática
06454 - Barueri - S. Paulo
suggests this calculator could have been distributed in Brazil for South America and Iberia markets.

The original owner is a financial manager at a insurance company and he used it at school just for statistics.
In the beginning of the 90's HP was recognized as the top maker in Portugal for serious calculators for the professionals and healthy students.

This calculator price was 31260$00 Portuguese escudos in 1991 (about 160 Euro), which was considered a very high price at the time.
The minimum salary in Portugal in 1991 was 200 Euro/month.

Some photos next, not the best ones I took so far, but the hotel room lights are trying the save the planet and so on, so I hardly can see my laptop keyboard right now.

[Image: 20140825_191845.jpg] [Image: 20140825_191253.jpg] [Image: 20140825_210003.jpg] [Image: 20140825_192015.jpg]

[Image: 20140825_192038.jpg] [Image: 20140825_204504.jpg] [Image: 20140825_204850.jpg] [Image: 20140825_223919.jpg]

Jose Mesquita
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08-26-2014, 02:22 PM
Post: #2
RE: Got my HP-28S year 1991 week 46 made in Singapure
Watch out for the hinges and batt dor cover. IIRC those were problematic areas with that series and I think that my 28S that I sold to a friend(when I bought a 48SX) eventually developed both problems, but he was quite a bit rougher handling it than I was...
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08-26-2014, 02:54 PM (This post was last modified: 08-26-2014 02:59 PM by jebem.)
Post: #3
RE: Got my HP-28S year 1991 week 46 made in Singapure
(08-26-2014 02:22 PM)cutterjohn Wrote:  Watch out for the hinges and batt dor cover. IIRC those were problematic areas with that series and I think that my 28S that I sold to a friend(when I bought a 48SX) eventually developed both problems, but he was quite a bit rougher handling it than I was...

Thanks for the hint, John.
I bought these 3 new batteries just for the test.
My plan is to remove them as soon as I finish playing around with my new "toy" Smile as it will join my modest calculator collection.

Jose Mesquita
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08-27-2014, 10:11 AM (This post was last modified: 08-27-2014 11:39 AM by aurelio.)
Post: #4
RE: Got my HP-28S year 1991 week 46 made in Singapure
(08-26-2014 02:54 PM)jebem Wrote:  
(08-26-2014 02:22 PM)cutterjohn Wrote:  Watch out for the hinges and batt dor cover. IIRC those were problematic areas with that series and I think that my 28S that I sold to a friend(when I bought a 48SX) eventually developed both problems, but he was quite a bit rougher handling it than I was...

Thanks for the hint, John.
I bought these 3 new batteries just for the test.
My plan is to remove them as soon as I finish playing around with my new "toy" Smile as it will join my modest calculator collection.

Hi Jose, maybe too much beer (Smile), but a good shot if the new toy is in mint condition, I've spent quite a long time, looking for a 28s without hinges and batt door cover issues, but never found : the only I met was the one used by a colleague, about 20 years ago....but it was just matter of time..........doom is written for intensive using

I bought one of that years ago on TAS but I sent it back, 'cause of the broken door not warned
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08-27-2014, 01:42 PM
Post: #5
RE: Got my HP-28S year 1991 week 46 made in Singapure
(08-27-2014 10:11 AM)aurelio Wrote:  Hi Jose, maybe too much beer (Smile), but a good shot if the new toy is in mint condition, I've spent quite a long time, looking for a 28s without hinges and batt door cover issues, but never found : the only I met was the one used by a colleague, about 20 years ago....but it was just matter of time..........doom is written for intensive using

I bought one of that years ago on TAS but I sent it back, 'cause of the broken door not warned

Hi Aurelio,
I was lucky because I did the calculator deal before getting drown into the hotel bar Smile
It is really in good condition because the owner never really did good use for it, so it stayed without batteries in a drawer for long time.
Guess what, the owner guides are new, I could bet he never took them with him to the school and probably he just have browsed them once.
And I was fortunate (I think) because the asking price was 40 Euro.

He told me that his daughter is going to the university, so he sold her Texas TI-84+ for 60 Euro, and decided to get rid of the HP-28S as well in the process, so he could get funds to buy her a new Texas Nspire machine as recommended by her teachers here.

Jose Mesquita
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08-27-2014, 02:15 PM
Post: #6
RE: Got my HP-28S year 1991 week 46 made in Singapure
(08-27-2014 01:42 PM)jebem Wrote:  And I was fortunate (I think) because the asking price was 40 Euro.
I think so

(08-27-2014 01:42 PM)jebem Wrote:  He told me that his daughter is going to the university, so he sold her Texas TI-84+ for 60 Euro, and decided to get rid of the HP-28S as well in the process, so he could get funds to buy her a new Texas Nspire machine as recommended by her teachers here.

Let them buy all the TI they need Smile
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