Seiko is commited to their clean energy concept, which is focussing on developping a new eco friendly watch. Such an important part of this concept are these Seiko Solar watches. In 1977 Seiko introduced her first solar watch. Since then the concept has been developping and improving. Nowadays they’ve come so far, Seiko developped a watch with an ultra efficient solar cell, which works on all kinds of light energy. This is why the battery of this watch last much longer.