Mathematical Instruments
Mechanical Instruments for Drawing, Measuring and Integrating
Drafting Instruments
Hommel-Esser Aarau
Kern & Co. Aarau
Jakob Kern
Kern & Cie.
Kern Aarau
Drafting Set
Hatching Apparatus
Proportional Divider
Beam Compass
Engraver Compass
Spring Bow Compass
Dotting Pen
Kern Swiss
Gysi & Co. Aarau
J. Bossart Suhr-Aarau
Various Makers
Rechenscheiben und Rechenwalzen
