Links

The best Homepage in Old scientific Instruments : Museum of the History of Science, Broad Street, Oxford http://www.mhs.ox.ac.uk/collections/imu-search-page/

Museo Galileo 

https://catalogue.museogalileo.it/index/IndexObjectsByRoom.html

Epact is an electronic catalogue of medieval and renaissance scientific instruments from four European museums: the Museum of the History of Science, Oxford, the Istituto e Museo di Storia della Scienza, Florence , the British Museum, London, and the Museum Boerhaave, Leiden. Together, these museums house the finest collections of early scientific instruments in the world. http://www.mhs.ox.ac.uk/epact/

Websters' Instrument Makers Database

http://historydb.adlerplanetarium.org/signatures/

Kern Aarau Suisse. Link to the collection of the Museum Schlössli in Aarau.

www.kern-aarau.ch

Link to objects in auction by Kern.

Rare books online. The e-rara.ch platform makes digitized rare books from Swiss libraries available to the public, free of charge.