This is the first released in mass production 4-spring model of George Carwardine, which he announced in 1932. This model was preceded by the legendary 3-spring model.
Visualization, as a tribute.
As reference I used a photo from the magazine Interni, and a pair of, hardly found in Google photos, so I ask for forgiveness for any (possibly rough) inaccuracies.
The model has a full rig.