Talcum Cans for Circular Slide Rules "Loga"

Talcum Cans for Circular Slide Rules
Marking: Puder zur Universal-Rechenwalze – Patent Daemen-Schmid Zürich Schweiz
Year: ca. 1920
Size: Can 1: 38 x 45 mm (Diameter x Height)
Can 2: 40 x 55 mm
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Referenzen

[1]

Loga Calculator AG

Anleitung zum Reinhalten des Loga-Calculators. Uster/Zürich (ca. 1921).