Europe > Swisse
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Correntator (Unical)
Correntator ( ca 1960)
Unical, Swisse
dimensions...........16 x 12 x 0,5 cm
weight..................350 g
material................brass
digits ...................10
single sided
including a pencil (r)
There is a metal grooved plate that flips from addition to subtraction.
With a cardboard case. -
Correntator (Unical)
Correntator ( ca 1925)
Unical, Swisse
dimensions...........16 x 12 x 0,5 cm
weight..................350 g
material................brass
digits ...................10
single sided
including a pencil (r)
There is a metal grooved plate that flips from addition to subtraction.
With a wooden base. -
Trebla
Trebla (ca 1930)
Albert Steinmann, La Chaux de fonds, Schweiz
dimensions...........17,3 x 10,7 x 1 cm
weight..................290 g
material................brass/ bakelit
digits ...................9
single sided
including a pencil
There is a metal grooved plate that flips from addition to subtraction (see next picture).
When you read Trebla backwards, you see Albert (Steinmann). -