Robotron K1003 RPN made in GDR

[AndiGer]

Interesting thing I never heard before:

Today showed up a Robotron K1003 made in GDR on German ebay-Kleinanzeigen.
According to the description caught from http://rechentechnik.foerderverein-tsd.d...index.html it works on RPN with a 3 level stack. It also is programmable and has a built in card reader and a printer.
Function modules can be attached / inserted (if you have one :-).

The seller asks for biding.

Here is the link:
https://www.ebay-kleinanzeigen.de/s-anze...8-168-3567