Waldmann MT 208, ST 208/308, STE 111 Fig. 2a (MT/ST 208, ST 308) Fig. 3 2.1 2.3 2.2 2.5 (ON) 2.5 (OFF) 3.1 Fig. 2b (STE 111) 3.2 2.1 2.3 2.2 2.4 3