Watch Fact of the Day: The 1960s Swiss Watch That Tracked Your Personal Biorhythms

📅 Wednesday, November 4, 2026

In 1965, Swiss brand Certina released the Biostar, the world’s first and only wristwatch designed to track a person’s daily physical, emotional, and mental biorhythms. To set the multi-colored complication, the wearer had to synchronize internal mechanical discs to their exact date of birth. While biorhythm theory ultimately proved pseudoscientific, the Biostar remains one of the quirkiest mechanical feats of the 20th century.

Category: Fun Quirk

Disclaimer: Every effort has been made to keep these watch facts accurate, but the world of horology is full of myths, disputed stories, and fascinating trivia. Consider these facts a starting point for discovery rather than the final word. If you have corrections or additional insights, let us know—we’re always happy to keep the record ticking in the right direction.

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Author: Jeffrey Guy (WatchesAndMore)

Welcome to Watches & More Co. – where time meets style. I’m passionate about all things horology, from classic mechanical movements to elegant dress watches and rugged tool pieces. This blog is my space to share reviews, insights, and style tips for fellow watch lovers and collectors. Whether you're new to the world of watches or a seasoned enthusiast, you'll find content here that informs, inspires, and sparks conversation. Beyond timepieces, I occasionally explore related accessories and lifestyle picks that complement a refined look. Thanks for stopping by – stay timeless. View all posts by Jeffrey Guy (WatchesAndMore)