The Citizen Crystron solar powered watch was the first analog watch to incorporate a solar cell. The initial prototypes for the watch were done in 1974 with the release of the Crystron in 1976. Citizen has produced solar powered watches ever since.
| Company | Citizen |
| Year | 1976 |
| Cell Type | Clothing, Product |
| Location | MOSE |
| Part No. | Crystron |
| Primary Use | Consumer, |
| Acquisition | Purchased |
