Boy, it's getting salty in Classic and Vintage tonite.
I already spent too much time on this but here;
http://www.wooljersey.com/gallery/v/...crown.jpg.html
Best I could find - nobody with a Somec (and there's a good few) seems to take pic's of the bottom bracket cutouts. Everything else, but no BB's.
edit - Abacus beat me to it and produced a BB shot.