One of a pair of attractive numbered chronographs with Valjoux 7733 movements. 38,5mm. ca 1970. Box and warranty certificate. Fully overhauled. 12 months warranty. Rare, possibly from a batch of as little as 50. The movements of both appear untouched (watch never opened?). Telemetre scale (speed of sound 3sec pr km). Tachymetre scale and regatta start countdown. Rotatable bezel with hours and minutes. “Made by Alfred Rochat et fils Horlogers, Les Bioux, Suisse”.