Show me your Game Used NFL Helmet

[mchmaj]

hello NFL helmet collectors
i need some tips about the helmets

i did got three used helmets from a guy who used to work for LA RAIDERS

seahawks easley used helmet but dont know what year its from

Raiders throwback 1994 game ready helmet with marker on back 4 K

jets 1990 game used mcmillan helmet

the question i am asking you about three or four helmets i am not sure of buying ...

chargers 1988 blue rawlings helmet with "box like blue facemasks" this facemask only used few years in late 80s, my opinion they are ugly looking facemasks in football history....haha
chargers helmet doesnt have white numbers on the back of the helmet ...


vikings purple helmet with purple facemasks the same facemask as chargers but in QB style

buffalo bills helmet from 90s and the seller claims its bruce smith helmet and i didnt believe him because he said the 1994 raiders helmet was marcus allens but he played for the KC chiefs in 1994

the bills helmet have AIR on the front of the helmet, i know players who worn air helmets doesnt have AIR on it ?? true ??? bills helmet doesnt have white numbers on the back of the helmet but it has NFL sticker on the back.

how can i find what year it is from etc and find proof that it is game used ??
pls help me
lmk
thanks
marcus