@Sir Neil d'Menture
A classic Colnago, one of my favourite makers from that late 80s - mid 90s period with the mix of classic steel frames and just enough new tech to make riding a bit more comfortable e.g. brifters, decent brakes etc.
I've just had a look amongst my pile of parts and have found an Elite Ciussi, alloy with yellow buttons that I probably bought in the very early 90s. IIRC it doesn't quite grip the bottle as tightly as it did when new, I'm not sure if it could be gently squished to give more grip.I won't use it again so you are welcome to have it; pm me with your details if you want it.
Kevin