Casio Pro Trek PRG600YB Analog/Digital Watch | REI Co-op
Watch Review: Casio Pro Trek PRG340 | aBlogtoWatch
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
Watch Review: Casio Pro Trek PRG340 | aBlogtoWatch
The Casio ProTrek PRW61 is bit more eco-friendly -