The Huret Multito. Its a belt drive, no ticking or clicking. Has cumulitive as well as resetting trip OD. I've bought them on ebay. Accurate also. Did a 75 mile ride group ride from the Waterford bike factory and compared mileage with another rider with computer speedo. HIS computer was off by a 1/10 of a mile after 75 miles.😁

Mounted on front hub.