Thanks for the advice guys, I'm going to go for it. A bit of googling seems to point to it being a Claud Butler Jubilee, which would make it even older, 1953/54 and Reynolds 531. Zaphod your right about the fillit brazing, apparently from the age when true craftsmanship was actually cheaper than fitting lugs! Times sure have changed. I'll keep posting with some updates, hope to collect it on Sunday.