Can you identify this thing?

I've got one on my model A

 

I gave it to a friend who is putting it on a model A coupe.

 

I love this place! You posted the answer two pages ago and they're still guessing wrong! At least they're not a bunch of cheaters!

 

Yeah but its fun!

 

Are you sure it`s not part of the Initiation equipment used to test potential Scroungers Car Club members..????

 

Return spring for a screen door on a submarine!
Gotta be strong with all them currents and stuff.

Yeah I am Ex Navy, why do you ask?

 

Ex-Navy? How was the BARREL? and did you find the GOLDEN RIVET?

Im ex-Army.