I don't see a moveable end cover so no manual advance & retard so must depend on an ATD Not keen on those things. BTH back in Vincent's manufacturing days were trying to do some thing similar. Brough's just fitted two mags, but this is neater, presume rotary magnet like the Scintilla which is the best mag I've ever had but now run out of parts, require distributor block & brushes and a set of points for my twin item and a set of points for the single item, both to be used on a repro Lightening and other on the only chain driven timing trials iron that Pat Wilson passed onto me done by the factory. !
bananaman