Seiko Prospex Compact Solar Scuba Diver This practical compact divers watch with sapphire glass is conveniently solar-powered; the watch charges from both natural and electric light. Prospex is a combination of the wordsProfessionalandSpecifications.These timepieces are designed to be practical, reliable and durable within extreme or everyday environments, for experts, sports lovers and adventure seekers alike. Since launching Japans first divers watch in 1965, Seikos innovative watchmaking has changed global dive watch standards.