Hey Grubsie,
Recently went through exactly the same scenario....I ended up having it back to front as I thought that as the 'F' mark lined up then power would be cut to the coil, allowing a spark to be generated....WRONG! (ha...50/50 chance and blew it
)
So now I know that (with your trusty 6V bulb and battery connected up) you want the bulb to LIGHT as the 'F' mark lines up with the timing mark.
Kev.