(https://i.postimg.cc/5jd21Ck0/Duck_hood_zpsxrhuubmv.jpg) (https://postimages.org/)
Gas mask
Not a gas mask, in the traditional use of a gas mask.
Fire fighting.
Nope.
It kind of looks like the plague mask that grandma used to wear when she clipped grandpa's toenails :innocentwhistle: :biggrin:
It is a plague mask, used by medical workers during the reign of "Black Death" in Europe. The nose piece was stuffed with herbs and other medicinal plants to try to isolate the the workers from those they were working with.
Imagine being on your deathbed and looking up and having that look you in the eyes :huh:
Look on the bright side. Your hiccups would be gone.