I just bought this bike locally. It measures 62cm seat tube by 57cm top tube. The head badge says William Brunner. No other decals or serial number. Interesting fork crown, Ive never seen one quite like it. Seat stays are interesting too. Some things don't make sense. Wheelset is 5 speed and rear spacing appears to be thus 120mm. But there is a front derailleur braze on and top tube cable guides. Not sure what the lugset is. Seatpost diameter is 27.2, it has a reynolds 531 sticker on seat tube, and bottom bracket is english threaded. What else can you see in these photos? Any ideas what this is? My theory is respray 70s bike with custom head badge and a few braze ons before respray.