So I started disassembling the '69 Raleigh Pro I talked about in this thread. It started easy enough, but I noted that the stem nut was stuck. I sprayed some PB Blaster, then removed other components. The front Mafac centerpull was hard to removed, I had to thread the bolt rather than just push it out.

Then I noticed that the headset suddenly got looser. It was tight and had a slightly indexed feel, but now felt loose. I was hoping it wasn't what I feared, but it was:



The steerer tube was attached to the fork crown not by brazing, but by the brake center bolt It appears there is hardly any brass in the interface:



On the plus side, the BB area looks clean, even if the mitering is not to the highest standards. The tubes are pinned:



So, how easy is this repair? I assume the crown race area will have to be built up from brass, is this OK? Time to talk to a framebuilder...