Yes, nice machine Woody. And as John says, it's always an added bonus to find a BMCo machine with it's top flash. However, I have serious doubts as to whether it's original. The artwork within certainly doesn't look new, but the whole thing just looks wrong. These larger top flashes were normally found on the much larger (non allwin) BMCo wall machines - the relatively small allwins had smaller top flashes, which were very 'squat' in height.
Can anyone else confirm whether the small BMCo allwins were ever fitted with large top flashes?