Thanks Rob!
If understood it right, the new number '156' was introduced, because the BA got its CE Certification in that year.
So true '156's could have a CE stamp or sticker somewhere on the case.
Apart from that the case and the exhaust tee is supposed to be a bit different to the old '150s'
I own about ten '109er', some converted, but only two original 'BAs'. I can't find any CE stamp on these, but maybe someone else here can on his.......
Cannot be too many since the production was stopped in 1998, but I'd like to see one.....