Geez... just did a double take.... I sold (and still regret it) my red Z-753 Team about 5 years ago.
[hazy memories] Yours is a Z-Centaur, as you know, it looks like a 1993, judging by the fork. Groupset is a mix of Campy, the canti's are Record OR, the other bits and pieces look like an Icarus/Centaur mix (brake levers are Icarus - the Record OR ones had alloy blades). The seatpost is Icarus, original seat was indeed a turbo and the original grips would have been ODI attack - the only non-Euro part on the entire bike!
Zinn was owned by Andy Thompson, and ridden by Isla Rowntree and Sally Hibberd BITD. Oh, and Mint/Jo Burt. I was told what happened to Zinn, but I've slept since then....!! They disappeared around 1994 I believe, so your frame would have been one of the last few Andy knocked out. There was some sort of financial problem IIRC?
The Z-Centaur I think was the middle of a range of three, the low-end was Sachs-equipped and the top two were Campag Centaur and Record. My Z-753 was the team edition top of the range and cost me £1,500. The Z-Centaur would have been about £1,000 new [/hazy memories]
Absolutely stunning bit of kit though. Mine was one of the sweetest riding bikes I've ever owned, with that zesty spring that steel bike owners are supposed to rave about.
Dibs if you ever decide to sell.....