Certina Biostar
Instead of vintage advertising, this time I’ve updated the database with a new model: The Biostar was the first and (as far as I know) only wristwatch from which you can read your biorhythm.
Instead of vintage advertising, this time I’ve updated the database with a new model: The Biostar was the first and (as far as I know) only wristwatch from which you can read your biorhythm.
Axel from the german Watchtime forum has made some great Certina pictures once again. Here they are.