Scootopia made Lambretta series 3 & DL/GP ignition switch & OSAM marked keys (as original).
DC ignition switches is set up as such:
Position -1: Grey connects to Black and Yellow (tail light and pilot light run off the battery). Green is connected to Pink (engine kill)
This system allowed a DC model to have emergency lights if the engine stopped running, by switching the key to the -1 position. The brown wire, which goes live in the 3rd setting was AC power from the engine, so when headlight was required, the headlight and tail light would operate AC at that point. The horn, and brake light also ran DC on these models, but their power was direct from the rectifier (horn) or jumped off the grey wire at the brake pedal switch.
So wiring works out this:
Normal Feeds are: