I've added a link on my Scottish framebuilders website to a page I've done documenting a visit to the Singer shop in Paris last year. It has lots of pics of the shop, workshop, bikes and Mr Csuka himself cold-setting a 650B Galibier frame for a Japanese customer. There's a photograph of the drawing he used which is like a specification sheet for this bike. I've added a few close-ups of the frame showing his brazing skills. Just go to:
and click on the Alex Singer link.
Singer v Herse? Now, there's a tough one!