It doesn’t seem so Mike, although that would make sense. It is ex LA Police so the twin filaments would have been for indicators and flashing reds. On the off side both indicators and hazzards are using the same filament. I am going to strip the wiring back and have a good look.
Having said I don’t think so, (2 filaments) I have now changed my mind, but tiredness has got the better of me and I’ll carry on tomorrow. Light at the end of the tunnel,maybe.