Here's some info about the company:
http://www.sewmuse.co.uk/Hengstenberg%20&%20Co.htm
And some more from sewalot:
http://www.sewalot.com/hengstenberg_machine_history.htm
It's a transverse shuttle machine, which means that the shuttle runs from side to side through the loop in the needle thread, rather than swinging in an arc, the way that it does in vibrating shuttle (VS) type machine.
It's hard to tell from the photos, but it looks like there may be mother of pearl inlays in the bed of the machine. :)