Rapid-Calc

Rapid-Calc
F.D., Italy
dimensions...........14,1 x 7,1 x 0,5 cm
weight..................65 g
material................metal
digits.....................8
single sided

Super-Simplex

Super Simplex
F.D., Italy
dimensions...........14,2 x 6,1 x 0,3 cm
weight..................85 g
material................metal
digits.....................8
single sided
included a cardboard map and a pencil

Micro Summa Omnia

Micro Summa Omnia, Sascol, Europian, Roma, Italy,  ca 1957

dimensions................11,3 x 4,4 x 0,8 cm

weight......................20 g

digits........................9 x 9

material----------------plastic

including manual and pencil