check this link,
http://www.first-to-fly.com/
it's problably from the Wrights company, I have a fiorelli from 1976 that came with a WF headset but the remaining text is in french and says "Marque deposee"
I don't know if my information is right, i'm also searching for the right producer of this headset.
greets,
Arno Volkers
eindhovenlaan 3
5224VG Den Bosch
The Netherlands