Pro Trek PRG-240 continues with the PRG-240-3 and PRG-240-5 - G-Central G-Shock Fan Site
Amazon.com: Casio Pro Trek Bio Mass Tough Solar Triple Sensor w/Thermometer Altimeter Barometer Compass World Time Men's Watch PRG340-1 : Clothing, Shoes & Jewelry
Amazon.com: Casio Men's Pro Trek PRG-270-1 Tough Solar Triple Sensor Multifunction Digital Sport Watch : Clothing, Shoes & Jewelry
Casio Protrek Tough Solar Watch Prg-240-1Jf Black Tested Work | eBay
Solar-powered Pro Trek PRG-340 improves on the PRG-240 - G-Central G-Shock Fan Site