Rechenhexe Modell I

Rechenhexe Modell 1 (ca 1960)
Otto Meuter, Germany
dimensions...........11,5 x 5,6 x 0,3 cm
weight..................30 g
material................aluminium
digits....................8
single sided
including a cardboard folder

Rechenhexe Mod. ll

Rechenhexe Modell ll (ca 1960)
Otto Meuter, Germany
dimensions...........15,3 x 8,6 x 0,3 cm
weight..................80 g
material................aluminium
digits....................8
single sided
including pencil

Rechenhexe mod. lll

Rechenhexe Mod. lll
Otto Meuter Germany
dimensions...........19,7  x 11,6  x 0,9 cm
weight..................270 g
material................aluminium
digits....................10
double sided

including pencil,cardboard box and manual