Certina Biostar Electronic - Reference 7501.001 - Stainless Steel - Biorhythm

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Certina Biostar Electronic - Reference 7501.001 - Stainless Steel - Biorhythm - Vintage 1970s: This is a fascinating example of a vintage Certina Biostar Electronic, a watch that combines Swiss quality and innovation with a unique feature: a biorhythm indicator that shows the physical, emotional, and intellectual cycles of the wearer. This watch features a Certina caliber 28-353 ESA 9154 electronic movement with 13 jewels, a sweep seconds hand, and a date function at 3 o’clock. The watch has a...