These really don't surface often nowadays.
I must admit though, this does look like an early model of these to me. It Still has the older style slider knobs and nylon reel holders.
Judging by the rear cover modifications it may even be a Beaulieu retrofit model, which they were known to carry out on request.
I much prefer the later type like Alan has that was built as a HTI rather than modified into one.
Nice interchangeable 16:9 gate with it though for those with the cameras and home made films to use with this feature.