Mathematical Instruments
Mechanical Instruments for Drawing, Measuring and Integrating
Drafting Instruments
Hommel-Esser Aarau
Ludwig Esser
Drafting Set
Proportional Divider
Pocket Compass
Protractor
F. Hommel-Esser
F. Rohr-Bircher
Kern & Co. Aarau
Gysi & Co. Aarau
J. Bossart Suhr-Aarau
Various Makers
Rechenscheiben und Rechenwalzen
