Right - that was fun. Managed to find and work out an 11-23 cassette. It's light and in good condition. Clean and with little wear. No idea of the level, it doesn't say record/chorus etc. The spacers confused the hell out of me but they're all there. and there's no lockring. Should there be? I think I have one lockring across all my campag cassettes. Can post it for £15? Is that a good price? No clue.