Abstract: An elongated clock includes a pair of adjacent, cylindrical, rolls providing one roll with five minute segments indicated and a second roll with twelve hours of morning and evening indicated. These rolls are mounted about a shaft connected with a constant speed motor which rotates the minute cylinder at a constant rate. A gearing arrangement at the end of the shaft couples the shaft with the roll indicating hours and turns the hour roll once every hour. A segmented drive gear is coupled to the shaft and includes a pair of teeth which engage a pinion which in turn has every tooth meshing with a gear attached to turn the hour roll. Thus, one complete rotation of the shaft produces one-twelfth of a full rotation of the hour roll. The pinion gear is prevented from overriding after indexing because a locking rim of the segmented drive gear nestles into gear teeth extensions of every other tooth of the pinion gear.