Vintage Calculators

My first mechanical calculator

My first electronic calculator

Early programmable calculator (TI SR56)Late hand driven mechanical calculator (Brunsviga 13RM)Diehl Transmatic V12

Both the Marchant and Diehl Transmatic (small pictures left) are not working yet.  I have put them aside for a while and started working on a few machines which I bought recently.  One of them is a Friden SBT 10 which is operational now.  It will be followed by a Madas 20 ATG and a Diehl DSR18.

Currently in repair
Marchant ADX

Recently added calculators

Last update

It all started with this little programmable calculator.  I bought it in 1976, build a small program for it and became a Philips software engineer one year later.

In 2013 I was cleaning my attic and found it.  The first idea was to sell it.

I didn’t …………

Looking on the internet what would be a reasonable selling price for the SR56 I ran into this little mechanical calculator.

What I found on the internet regarding this and other machines was very interesting.  So, I bought it ..... and another one and a more complex one …………

Late mechanical calculator (Friden SBT10)

How Semiconductors Changed The World

About 1970 the world of calculating machines rapidly changed from mechanical

 to electronic.  Using a slide rule  most of the time and electronic calculators not being allowed at school, I wasn’t aware at all of the changes that took place.

Now I consider it my mission to setup a small collection of well preserved and operational calculators which are representative for the changes that took place in that period.

Added Friden SBT10


Added Olympia RA16


Added charging info regarding the Canon LE10 charger

Update history

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Vintage-Calculators Friden SBT10

Friden SBT10

Friden (Singer) EC 1117

Friden (Singer) EC 1117

Precisa 366-12

Precisa 366-12

Olympia RA16

Olympia RA16