A repository of links to informative watch related websites, organized alphabetically.
- Chrono Maddox – Database of articles by Chuck Maddox. Serial number charts, vintage Omega and Heuer information, general watch guides and how-tos.
- Ranfft Watches Archive – The Ranfft Watches Movement Database provides photos and technical specifications for over 10,000 watch calibers. Not all the site has to offer, but the crown jewel.
- Speedmaster 101 – An authoritative guide to the Omega Speedmaster. Includes model evolution, identification, up to date pricing, and many reference-specific details.
- The Watch Guy – Guides for the DIY watchmaker. Attempt at own risk.