The hat is some sort of "Steamship" (Merchant Marine, Ferry Boat, Cruise ship) hat....limited interest in most cases...
The French Kepi is a fairly modern Police low grade officers (not ORs) but little interest except to Police collectors....most of the small pins & badges are of little interest too, as most are postwar....BUT:
There is a pair of scarce US WW2 DIs (The winged skulls) which are Army Air Corps, there's also a silver pair of what appear to be WW 1 US Pilot's wings (pointed wings w/shield in center) which would be quite valueable if real, and I see a couple WW 1 era US Army Air Corps officers collar pins, not a pair, but singles are worth $25./30 each, and the French Pilot's badge would also be good, if it's original.
Most of this stuff you'll "Die with" collectorwise.....of little value or interest to "anyone" .....however, there are enough good items that if you could buy the lot for "say $100.00 +/-" or so....it would be worth it. (If the WW 1 Pilot's wings are real...you could up the offer to $200.00+/-) and still be "safe".
Would depend on the price IMO....