Glad the pictures were enjoyed. The PITA (to ID) regulator is sitting on my (roof) balcony in sunny Andalucia, Spain.

I contacted Bosch about this and they sent a helpful document identifying all the Bosch electrical parts that came with my van originally. That stated the regulator was external, which it clearly isn't, which is more pointing in the directon that the engine isn't the original.

Is it safe to assume that if I get a regulator with a 28mm diameter, it'll work as the old one? I'm not convinced of that, but then my electronics knowledge is minimal.

EDIT: think I read somewhere that if the brushes are of a different length, that's a problem...is that right?