Addiator Maximator Negativ #226203 (ca 1950)
Addiator Rechenmaschinenfabrik, C. Kubler, Berlin, Germany
dimensions...........17 x 11 x0,4 cm
weight..................220 g
material................brass
digits....................9
double sided
On the backside there is also a negative unit.
With a metal console and pencil.

See: in combination with Addiator speicherwerk.