Vintage Calculators
Vintage Calculators

My first mechanical calculator

My first electronic calculator

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

I temporarily stopped working on a  Diehl Transmatic.  The machine needs a timing belt with a pitch that may not be commercially available anymore.

A  Marchant 8ADX will follow the Monroe added 16 aug 2018.   

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 the above  small 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.


Soemtron 215 minor repair


Added Monroe 8N-213


Added Walther EMKD

Update history

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Vintage-Calculators Casio FX-7000G

Casio FX-7000G

Monroe 8N-213

Monroe 8N-213

Marchant 8CMR

Marchant 8 CMR

Walther EMKD

Walther EMKD