Thank you very much! I must admit, after looking at it for 2 months in my living room, seeing it out in the sunshine has me all wide-eyed and at a loss for words.

The threads are British - oddly as I bought them from Le Velo Dans Le Retro, a dealer in France. He's the guy linked to both pairs of Arc-en-Ciel rims above. I've bought a few things from him and find him great to deal with. Has all sorts of obscure stuff, mostly NOS.

Yes, Lyotard 460D, my favourite. I like them so much I have them on all of my bikes I also have a pair of Marcel Berthet that I might try on the Chesini but I didn't get on with them on my Thanet. I've fitted clips to the one on the bike now and will try them out tomorrow.