The dual visor Sierra Eng. APH-6B was a 1967 development of the single visor APH-6A and was specifically made to attack a/c safety requirements, since the clear visor should have been lowered at all times during the flight. As such, it was worn mostly by A-6 Intruder crews, but fighters crews used it as well. The similar looking APH-6C had different comms and liner.

This particular helmet most probably flew with VF-211 aboard USS Hancock around 1972.