History of solar watches including many digitals nicely laid out in a year by year table.
Takaharus stunning site of extremely rare and beautiful digital watches. Excellently photographed. Check out uber rare Seiko Ana-digis. Takaharu also wrote the superb Mondo Watch LED and LCD volumes. An absolute must for the digital watch collector.
Handheld Game Museum
Run by Rik this huge site featuring hundreds of vintage hand held games and game watches from the 80s and 90s. Also features a forum, manuals and game repair.
klayymann's Casio Catalogues
The indispensable Casio Catalogues 1980, 1982, 1985 and 1986
Timex Ironman Timeline
Great Timex Ironman Timeline loads of photos, excellent information. If you are into your rugged Timex got on over there!
Andy Dunns Vintage Watches
Andy Dunns site is full of well photographed unusual digital watches, real collectors site. This beautiful site, along with a couple of other great sites, inspired me to create Digital Watch Library site.