A RARE CERTINA MEN'S STAINLESS STEEL ELECTRONIC BRACELET WATCH TO CALCULATE YOUR BIORHYTHM

Model: Biostar Electronic
Date: Circa 1970's
Case reference: 7506-001
Movement: Signed, electronic
Dial: Signed, greY/blued, silvered applied hour markers, white outer minute division, silvered srick hands, sivlered centre seconds hand, aperture for the biorhythm at the twelve o'clock position
Case: Signed, stainless steel, screw down back
Bracelet: Signed, stainless steel
Size: 39mm

The Certina Biostar Electronic, first launched in 1965, was the first and only watch in history that could be used to read your biorhythm.