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Stats...



3/ 1982

size

 90mm
275mm
80mm

0.9kg



200 rubles




4 x D0.55, <0.5W

S/N

2012


Factories...

factory mark




SERD 21PD-N

It is quite obvious that these machines are close brothers.

SERD
Click for larger image

(SERD = Sanyo Elektronik Rechner Deutschland = Sanyo Electronic Calculators Germany).

Thanks to Thomas Brockmeier for the image and report of the SERD machine.

Elektronika MK-40

MK-40(c) Sergei Frsolov

This is the first and only Soviet-made small-form portable printing electronic calculator.

manual(c) Sergei Frolov

© Sergei Frolov
prototype!
The purple stamping in the guarantee page, above, reads "experimental". This stamp, combined with the low serial number, implies that this may have been a prototype machine. Great find, Sergei!

backplate(c) Sergei Frolov
The Backplate

Digital Archaeology

Prior to December 1998, the two images below were the only known images of the MK-40 machine. This highlights one of the aspects of collecting Soviet calculators that I find really enjoyable - the hunt! As with this, and many other machines, gathering information is a slow process - usually many sources contribute to the knowledge about models and their capabilities. The comparison between the two images from articles/books, and the actual machine, is interesting. The variation in the key size in the top row implies that the one on the left was drawn from a description, and the one on the right from an actual machine or picture of a machine.

(c) Sergei FrolovMK-40
 (c) Sergei FrolovMK-40




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