I was fortunate enough to pick up this nice Roy Thame today. I assume it's a rebadged Holdsworth as it does state supplied by W F Holdsworth on the Roy Thame decals. It is 531, has nice cutout lugs, hand lined, Campagnolo dropouts and the frame number is 75357. It's a touring model as it has mudguard eyelets on the dropouts front and rear. Can anyone date it or name the model ?