Hi, I am a newbie to the site although been restoring and riding road bikes for a while, I have recently purchased an old Dawes frame and cannot tell which model it is. As you can see from the photos it has nice lugs and believe it to be repainted some time ago. I think it is a 531 frame but cannot be sure. Would apprieciate any help identifying it? I have taken the head badge off but it is the same style as the sticker on the frame - my research tells me the bike is late 70's but I'm hoping you guys can tell me more. Thanks in advance.