Not a Professional. [edit] 531 Reynolds decal says "3 tubes" 531. Not forks or stays.

Looks like an mid-60s Hosteller. Catalog page from '64 if you want to visual on it. http://www.gitaneusa.com/images/cata...64/Page_02.jpg

That said, A light rubbing compound will get the paint back to the condition you see where the shifter clamp was. It should polish up nice and get that awesome emerald metallic to pop and gleam. Don't forget to tape-mask the decals while rubbing it out.

For the top tube clamps, I'm pretty sure a set of Simplex clamps should suit you fine. If you need a set, I can dig in my bins to see if I have something suitable.

Curious, what are you planning for the bottom bracket, you already have 35x1 French-thread cups and a suitable spindle?