The frame arrived today and it looks like a 9.8 out of 10. A very small nick on the front fork, a couple of pin prick sized nicks on the top tube, and a slightly tired 531 decal spoil an otherwise mint frame. Now the interesting thing is, the lugs are not Capella. They are the later Supercourse II style lugs. I guess this frame was built at the end of the run of the standard Supercourse just before the arrival of the Mark II, making this frame to be a '74. It curiously has a Shimano shifter bracket and the brakes on it are Mafac Racers. I suspect this frame was in fact built up at one point using non stock parts.

I'll take pictures soon.