Gull-wing ribbon-cover design, with tiny ribbon spools
Sliding it open
Closed - the "trapdoor" drops when the machine is opened so the shift can operate
The base of the machine actually faces out when you pick it up by the handle
Size comparison with the Hermes Baby
A couple of vintage ads for the Rooy after the cut:
This ad shows the earlier version of the Rooy - ours came a bit later. (Source)
The copy says: "Rooy portable typewriter - the flattest in the world. 4cm thick, case included. Put it in your bag or carry it by the handle of the case - it barely weighs 4 kg!"
For more reading on the Rooy, Will Davis has done some excellent research.