WIW 70 gas cap

[Katfish]

I like to get opinions on what this cap might be worth.
I'm pretty sure it came off my 70 Challenger.
Thoughts?

 

[bc3j]

My 70 CA built Challenger gas cap with the ECS system has the words PRESSURE VACUUM on the cap. That’s only for the cars with the ECS system. It in the FSM page 14-117. I think that cap is for any car w/o ECS. No idea of it’s value.