Casio's new Pro Trek watch is made of corn and castor seeds

The Casio Pro Trek PRW61 is the first Pro Trek model to be made using renewable biomass plastics, but is still just as tough as you need an outdoor watch to be.

The New Triple Sensor Pro Trek (aka “Pathfinder”) by Casio – Professional Watches

Nature-friendly Pro Trek PRW-61 and PRW-51 watches are made with regenerable biomass plastics - G-Central G-Shock Fan Site

Casio Pro Trek Green Watch PRG-340-3

Casio's new sports watch is made from beans and corn, and powered by the sun

Casio to Release PRO TREK with Biomass Plastics and Dual-Layer LCD

Climb Higher with the New Casio PRO TREK PRG-340 » Explorersweb

Casio brand's first eco-model is born from the popular outdoor watch series “Pro Trek”. – GO OUT

Casio Pro Trek Triple Sensor Solar Watch

Casio Pro Trek Bio Mass Tough Solar Watch PRG340-3 – Watch Direct Australia

PRG340T-7D, Protrek Watches

Casio to Release Octagonal PRO TREK with Metal Bezel

Casio Pro Trek PRG-340-1 Black Watch

Nanga x Casio Pro Trek Collaborate On Biomass Trail Watch