Info

grail-watch.com    Extensive watch movement database; all major brands

beyondthedial.com    Great and useful website publishing in-depth articles on famous and lesser known brands

theseikoguy.com    Comprehensive website from Andrea Secco. Much about Grand Seiko, Divers, old catalogues etc. 

thegrandseikoguy.com   Comprehensive website about Grand Seiko. Much info, old catalogues etc. 

watchhunter.org    This site contains a survey of old Seiko catalogues. Here's a link

plus9time.com    Lots of information on modern and vintage Seikos

chronomaddox.com    Omega production dates. 

speedmaster101.com    Lots of info on the Omega Speedmaster.

oysterinfo.de    General information about Rolex Oyster watches. Very informative. 

drsd.com    Everything about the Rolex Double Red Sea-Dweller and other sports models. 

gmtmasterhistory.com    The history behind the Rolex GMT-Master.

oysterquartz.net    General information about the Roelx Oysterquartz. 

5513mattedial.com    General information about the Rolex Submariner 5513 with matte dial. 

minus4plus6.com    Production dates and reference numbers of Rolex Oyster models. 

rolexmagazine.com    Jake's Rolex page; information, blogs and much more. Very informative, very entertaining! 

seriouswatches.eu    Serious Watches / online dealer of Orient, Nethuns (bronze) etc. 

Wesselink & Vreeker    Wesselink & Vreeker, Alkmaar. First-class Rolex and Omega service. Our watchmaker.