Still today, the history of this item in use with the Swiss AF is unclear:

The only other specimen known to exist can be seen in the "Fliegermuseum" at Duebendorf AFB, with the name of the pilot "Heiri Schwyzer" (something like

"John Doe") on the visor yoke.

It was probably used for some tests/ trials. There is a picture showing a pilot

wearing this type of helmet at Meiringen AFB, probably taken in the mid '50, but no

further facts are known.

This specimen is a reproduction, based on the above mentioned helmet.

The oxygen mask is an A-13, connected to the helmet's leather tabs with snap fasteners and a hook.

Originally built as a pressure demand type, it was later modified as a

diluter demand mask by adding the same valve (the round one on the left side)

as the one installed on the British "Type H" (see the Mk.1A helmet), due to the fact

that it was used with British built oxygen systems.

Most of the Swiss AF oxygen masks (A-13 and MS22001) have been modified

in the same way.