Got a nice frame yesterday, its not got any tubing decals but has internal rifling, going to double check today but I believe they run along the tubing rather than spiralled. Any ideas what it is?
Drop outs are Reynolds but I don't think its 708. Builder would use whatever was good/suited apparently.
Columbus SLX?
https://www.vintagevelo.co.uk/blog/columbus-tubing-in-the-80s/