Promaster Professional Diver. Promaster Crown. Light passes through the covering crystal and dial before it reaches the solar cell. A solar cell beneath the dial converts any form of light into electrical energy to power the watch.
Awesome watch. Perfect size. Very well built and tough. I've had a few serious in my time. The bracelet always scratches easy. Not Orient. Keeps great time. This is my fourth Orient watch and I'm hooked. Great watch.......