Hi everyone, thanks for the replies.
She is the one advertised on Facebook, and is now based in Cambridge (will eventually be sailed at Hunts). She's not in bad condition, though has a small hole which apparently appeared when her previous owner towed her home, and a few other bits on the hull need drying out and fairing in. The inside seems fine though all the fittings have been taken off. She's going to be a winter project to fill the hole, strip, fair and repaint the hull, and probably a coat of paint on the top.
She's inherited a load of kit (still not sure how many jibs!) along with a mainsail from another Cherub which had to be scrapped (I know the owner of that one too), as well as her own mast and another mast. The carbon mast she was advertised with previously is being kept by the previous owner who is building a Farr 3.7. We'd thought 60s from the description of the design on this website - one of her mains was measured in '76 so figured older than that - good to have a better age.
Interesting point about the centreboard: I have a pile of foils, none of which I'm sure is for the boat (I think there's an Oppie daggerboard in there...) but the likely candidate for a centreboard seems to be a cross with a daggerboard - there's no hole for a pivot, but the case extends well under the foredeck, with I think a pulley system. Anyone any ideas?
I've no doubt I'll be posting for advice once I start working out where all her fittings go and how to put her together - thanks for the welcome!