I have checked the mafacs that I have against a 610 wienmann and it looks about the same so I think I am safe for brakes. The weinmans that were on the bike are the red label ones so are obviously a later addition. I would think 700s have been fitted at a later date and different brakes fitted accordingly.
As for the frame features RK I think your right, shop frames did vary from the catalogue models. The drop outs are vertical, they are simplex ones and the only info I can find out about these was that they were to be shown at a 1964 bike show and the details that I found were a drawing with a caption.
I have so far got the frame took apart and cleaned up, it was covered in yellow gunk. I have Mafacs waiting to go on and campagnolo Nuovo record parts and now I am looking for 27 x 1 1/4 36 hole rims, if anyone knows what type and where to find these I would be greatful.
Thanks john