Just a thought, Jim, but would Norman have recorded it with guitar accompaniment, which is what Conan was asking about ?
I have 2 favourite versions of that song, both by Aberdeen singers.
Tom Spiers [ of "The Gaugers" ], I'm fairly certain recorded it, and it also used to be sung by Alan Carr, now resident in the USA, but coming back to the UK for some gigs this summer. As I think about it, I'm fairly certain neither of these singers would have recorded it with guitar accompaniment either, so that's maybe not much help to Conan either.
Maybe the best version I ever heard would have been by that great Fife singer, Jimmy Hutchison.
I really can't think who might have recorded it with guitar accompaniment, and wait with interest to see if the singer can be identified.
PS - maybe Jack Beck with "Heritage" ?