Links
Andere nuttige en interessante websites.
Horlogerienmuseum: 
Internet Resources on Horological Organizations: https://theindex.nawcc.org
The national association of watch & clock collectors inc.: https://www.nawcc.org
Fondation de la Haute Horlogerie: https://www.hautehorlogerie.org/en
De slinger: https://www.phy.ntnu.edu.tw/java/dutchjava/Pendulum_nl/Pendulum_nl.html
AHCI: https://www.ahci.ch