Hi Peter,
Your bracket is the same as mine (dynamo) & your belt looks as if it could be a little shorter than mine.
I would think that quite a few cars have gone over to alternators through the years keeping the same bracket? There there are also many cars with non standard brackets & pulleys so I think, these days, it's a question of what ever fits the car in question.
Bring yours with you & we'll compere it with the ones we bring along to the meet.
Also, does anyone know why some belts have 'teeth' (for want of a better word). Original ones didn't have them?
Looking forward to seeing you on the 4th.
Dave B