Mathematical Instruments
Mechanical Instruments for Drawing, Measuring and Integrating
Drafting Instruments
Hommel-Esser Aarau
Kern & Co. Aarau
Jakob Kern
Drafting Set
Spring Bow Compass
Caliper
Kern & Cie.
Kern Aarau
Kern Swiss
Gysi & Co. Aarau
J. Bossart Suhr-Aarau
G. Coradi Zürich
Haag-Streit
Various Makers
Planimeters and Integrators