The best Homepage in Old scientific Instruments : Museum of the History of Science, Broad Street, Oxford

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.

Websters' Instrument Makers Database

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

Link to objects in auction by Kern.

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