Vintage Calculators

My first mechanical calculator

My first electronic calculator

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

Recently I found this printing Diehl Transmatic V12.   It contains a toothed belt which has completely disintegrated. Nevertheless I managed to operate it by turning the main shaft manually. All functions worked ........ Not any more. It got stuck in a multiplication.  So ...........  This will be my next project :)

Diehl Transmatic V12

With the experience from my Hamann 505 I managed to repair the 505 of a fellow collector. To show  appreciation he offered me this Marchant ADX.
It may unexpectedly appear to be an even more difficult machine.  There seems to be a loose spring deep inside the control unit.  I’ll have to take it apart, not knowing if I’ll ever be capable of putting it back together.

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 charging info regarding the Canon LE10 charger


Added a typewriter


Added a link

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Vintage-Calculators Victor 1900

Victor 1900-1421



Friden (Singer) EC 1117

Friden (Singer) EC 1117

Friden (Singer) EC 1117

Precisa 366-12