It's a Trilox Rollsette. Like this one below, dating from about the early 1950s I'd say.
It would indeed need a bit of work, but it's not the worst I've ever seen, nor is it totally beyond hope either. There have been a couple of older, "open" conveyances fully restored from less than this over the years.
Funnily enough, I was informed by two people at the National that a hulk of some sort had been seen at Netley Marsh, and I was wondering how I was going to find out what it was. Many Thanks Triporteur!
I strongly suspect also, that this is the very same hulk that was spotted in the Great Dorset Steam Rally autojumble at the time of last year's National when I was holding my Gathering of conveyances.....
