OK, so after Googling a bit, I found this site...
http://www.sewmuse.co.uk/bradbury/bradburyindex.htm
And by comparing pictures, I think this one is a "Bradbury's High Arm Family".
The seller just got back with me, it's still available, so I'm going to try to acquire it.
Here's a picture of it - hopefully she will be mine by the weekend...