amazon: Seiko Men's SNE050 Solar Strap Charcoal Dial Watch for $92.98, FREE shipping
Solar; Quartz movement keeps accurate time, no battery required
Powered by all types of light
Solar cell with high performance electricity generation
Energy-efficient movement with long power reserve
Water resistant to 99 feet (30 M): withstands rain and splashes of water, but not showering or submersion