The very first Protrek watch reviewed. | WatchUSeek Watch Forums
Maratac US MIL 20mm Grey on Casio ATC 1000 - YouTube
Vintage Casio Pathfinder 1170 ATC-1200 Watch, Working Rare | eBay
1996 A,B and C – re-posted – Watch space
Casio ATC-1000... La bestia ancestral de los Protrek | Relojes Especiales, EL foro de relojes
casio atc 1000 for sale | eBay
Shaun Cuff on Twitter: "Just fitted new batteries to my Casio ATC-1000. This particular model is 25 years old and was Casio's first triple sensor watch (digital compass, altimeter and thermometer). #WearableTech #