Can you help to identify these frames, bikes or parts?

Been trying to find out more info on this early 80's Raleigh. Checking the serial number against Sheldon Brown's article on early Raleighs says that it was made in the first half of '83 in the Worksop factory which indicates that it's either 531 or 753. Resprayed in the code correct Ferrari red you see before you in the mid nineties, going to try and somehow strip down this layer as carefully as possible at some point in the next couple of days to see if that yields any unusual or distinctive OG paint underneath(I don't think the frame was stripped or blasted before painting). Not expecting anyone to know much about it really unless there's serious classic Raleigh buffs about but thought I'd chance my arm. I didn't know the frame was anything decent before remorselessly lopping off all the brazes so spare me please. Any help appreciated.

its not 753 ,531 with pressed lugs and bracket