This view shows the central part of the Adwel mechanism from underneath.

The upper section of the baseplate holds the two main springs, which supply the energy for the return stroke.

The fronts of the keylinks are visible at the left of the central section, with two of their long tension springs.The leading zero supression mechanism is in the centre, with the bottoms of the carry links and their reset bail visible at the right quarter.

The leading zero supression mechanism consists of a set of flat-topped cascaded fingers which sit between and over the keylinks (relative to this view). If all digits to the left stand at zero, the fingers will drop behind a small step in the keylink; otherwise, they will have no effect.

Just before printing occurs, the shaft carrying the fingers is pushed forward horizontally by a distance of one numeral position (to the left in this view). The links that are still at zero (the bottom four in the picture) will be pushed forward against their springs, pulling the numeral sectors on the rotor into a non-printing position below Zero.