Here are a few photos of a couple of different pieces of flight head gear in my collection.
1.) FAA "C" Helmet with painted brow. The name BISHOP (pretty sure it's not Billy tho).
2.) Odd RCAF flight headpiece. Marked on inside with Broad Arrow C and by a Montreal maker (too light to photograph). Canvas "skull cap" construction. This came from an RCAF pilot friend of mine who was an instructor at AOS #8 then flew with #10 RCAF- Atlantic Squadron Coastal Command and finally was a pilot with Ferry/Transport Command.
Thought they may be of interest to someone.