I've spotted a bike with a decal that says "Reynolds 531 tubing". I'm wondering whether this means that the whole frame is a proper 531, or only part(s) of it. The reason I'm asking is that I read the following somewhere:
A full 531 frame says "butted tubes, forks and stays", a full main frame says "butted main tubes and stays" and some say "butted main tubes" or "butted main tube" which means that either only the main triangle or perhaps a single tube is 531, respectively.
Since the phrase "Reynolds 531 tubing" isn't included here I'm slightly confused as to whether it would be worth getting this.
Many thanks for your help