Need help identifying helmet
This appears to part# 30171 Minifigure, Headgear Cap, Aviator



In black it appears in 118 sets.

However, I checked with my helmet from Robo Pilot 
and that one has a LEGO marking on the inside, yours could be a older mold though.


Edit, I also have one with a 7 marking inside , no logo, so I would assume it is from an older mold.