Some of the early solar watches of the 1970s had innovative and unique designs to accommodate the array of solar cells needed to power them ( Synchronar, Nepro, Sicura and some models by Cristalonic, Alba, Seiko and Citizen ).
Some of the early solar watches of the 1970s had innovative and unique designs to accommodate the array of solar cells needed to power them ( Synchronar, Nepro, Sicura and some models by Cristalonic, Alba, Seiko and Citizen ).
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