Addiator Duplex Sterling # 159183 (ca 1950)
Addiator Rechenmaschinenfabrik, C. Kubler, Berlin, Germany
dimensions...........12,3 x 7,8 x 0,4 cm
weight..................130 g
material................brass
digits....................9 (5 pounds, 2 shillings, 2 pence)
double sided
including pencil