I've been enjoying this thread and though I don't have much. to contribute, I thought I'd share this mess that ended up in my hands. I think it's a Raleigh Grand Prix and although it's a disaster there are all kinds of quirks to it.

Someone has set it up with as a triple with A. Duprat cranks. Unfortunately they don't seem to be anything special (and they are in awful shape), but I found them curious nonetheless. I'd be interested to hear any thoughts any of you have to share that may educate me a bit more about Duprat cranks or this curious setup. The inner ring has to have less than a mm of clearance between it and the stay. Anyone think these are worth cleaning up and installing on a better frame, or at least one without a bent fork?

Cheers.