Weblinks

Dr. Armin H. Frei
Engineering and Technology History Wiki ETHW, First-Hand Histories
"The First Quartz Wristwatch", 2009 https://ethw.org/First-Hand:The_First_Quartz_Wrist_Watch

Dr. Armin H. Frei
Engineering and Technology History Wiki ETHW, First-Hand Histories “The First Quartz Wristwatch Assembling Crew”, 2009 https://ethw.org/First-Hand:The_First_Quartz_Wrist_Watch_Assembling_Crew

Michael A. Lombardi
National Institute of Standards and Technology (NIST), Time and Frequency Division
“The Evolution of Time Measurement, Part 2: Quartz Clocks”
IEEE Instrumentation & Measurement Magazine, October 2011
https://tf.nist.gov/general/pdf/2534.pdf

Carlene Stephens
Smithonian Institution, Lemelson Center for the Study of Invention and Innovation
National Museum of American History, Washington D.C., United States of America
”The Quartz Watch, Swiss Inventors”, Website of the Smithonian Institution, 2003
https://web.archive.org/web/20090109114801/http://invention.smithsonian.org/centerpieces/Quartz/inventors/swissinvent.html

Dr. Eric Vittoz
“The Electronic Watch and Low-Power Circuits”, IEEE SSCS News, Summer 2008
https://ieeexplore.ieee.org/ielx5/4563671/4785770/04785777.pdf

All Rights Reserved, Copyright © 2019-
Dr. Armin H. Frei Heritage Estate, Zurich Switzerland