I don't see why not as some of the staff who built frames at Worksop carried on in Ilkeston & Nottingham and all 531 frames were craftsman handmade ( 531 is not cheap! ) I have a similar quandary with mine as its either a 72 or 82 nobody knows and I,ve had conflicting advice from shops although it has a funny looking fitting on the rear chainstay which apparently is for hooking the chain on when removing the wheel suggesting 72 yet braze on shifter bosses and allen key fitting brakes (82). Its still a comfy ride but lively enough to spit you off if you don,t concentrate on riding and have to do something suddenly (twice its had me ,once whilst avoiding a monster pothole & again when panic braking both due to lack of attention) At least this one has not been turned into a fixie and has some nice kit on it, shame about the seat though as its crying out for a proper saddle (Brooks forever)