AxBxC Calculator

AxBxC Calculator (# 366917, ca 1964)
Produx, Germany
dimensions...........27 x 9 x 17,5 cm
weight..................1.8 kg
material................metal
capacity................10 x 14

Chadwick

Chadwick (ca 1950)
Japan
dimensions...........13,5 x 4,5 x 2,5 cm
weight..................50 g
material................plastic
including cardboard box and manual

Clay-Adams 5

Clay-Adams 5, Laboratory Counter (# 30421)
Clay-Adams Inc., New York, USA
dimensions...........21 x 5,5 x 3,5 cm
weight..................1 kg
material................metal

Clay-Adams 8

Clay-Adams 8, Laboratory Counter (# 50751)
Clay-Adams Inc., New York, USA
dimensions...........28,5 x 6 x 4,5 cm
weight..................1,2 kg
material................metal

Marbel Blood Cell Calculator

Marbel Blood Cell Calculator (# 9112, ca 1921)
The Marbel Blood Calculator Co, Chicago,, USA
dimensions...........27,5 x 10 x 8,5 cm
weight..................2.3 kg
material................metal

See: http://www.fisicamedica.it/museo_virtuale/02_sezioni/articoli/data/Marras_blood_cell_calculator.pdf      (Italian and English)

Marbel Blood Cell Calculator (Inside View)

Multical

Multical (# 50138)
Produx, Eclair-Bureau, Paris, France
dimensions...........13,5 x 10 x 9 cm
weight..................1,5 kg
material................metal
capacity................11 x 14

Alexe