Horn / buzzer for Lambretta series 1 and 2 with 12 V and for on-board electrics with direct current. However, it also works with alternating current, just avoid honking to prevent damage to the horn.
Is bolted directly to the frame with two M5x10 bolts up to model year July 1960. A rubber pad is placed under the screw connection points to decouple vibrations.
From July 1960, the horn is attached directly to the frame using a bracket (item no. 3333492) with an M8 nut.