OldCalculatorForum Google Group

Does anyone know the polarity for a Canon TP-6 Pocket Printer?

2013-05-19T21:04:43Z

I picked one of these things up without a charger. I have a universal DC
adapter that I was going to use to charge it up and see if the battery
still even holds a charge. However it does not indicate the polarity of
the power input. 50/50 chance but it could destroy the circuits if I get
it wrong? If someone happens to have a canon CH-4 Charger could you tell me

Has anyone heard of a NETRONICS N3000X calculator?

2013-05-14T18:28:10Z

Has anyone heard of a NETRONICS N3000X calculator because I have one right
here in front of me and I can't seem to find anything about it?

Pascaline sold at Breker auction 25th may

2013-05-12T07:20:05Z

Hi, you probably already read it on Calclist, but may be some of you are
not yet on this "old" list. Breker has now changed his annouce and sell the
Pascaline as a 1920 true model (replica).
May be you would be interesting to read some points who clearly indicated
that the Pascaline was a replica.

Mathematical tables

2013-05-08T09:58:48Z

Hi all,
i hope that this question is enough on topic.
If not, please excuse me.

I found an ancient French book with mathematical tables for commercial use.
Book seems complete, but the cover page. It has been lost :-(
Then i'm not able to discover author and title.

Anybody could help me?