First one is WWII with a Firestone liner.
Second one is also WWII with a Westinghouse liner.
Third one is a WWII-era shell with a Korean War-era liner.
The two that had no liners are from the late 70's or early 80's.
Then you've got the remnants of an early westinghouse liner (no paint), an interesting camo Korean War-era Capac, and three Vietnam War-era or slightly later liners, the last of which is an airborne model.
Very nice stuff! I love that WWII Firestone.
Looking for WWII U.S. dog tags
Nice haul, JM!
The liner with the "F" was indeed made by the Firestone tire company. The helmet with "20" painted on the shell and liner may have been from a Navy vessel... they tended to mark helmets with either the number of the ship or the number of the specific gun emplacement or battle station located on the ship!
Wow, thanks for the info!