Need Identification Assistance

[Claudia]

Can anyone help identify what these parts are specifically and what they go to . . .

[JS29]

The third picture looks like A gas cap for A 1967-68 plane Jane Camaro!   

[Claudia]

Yeah, I thought that too but I couldn't seem to find a Camaro gas cap with the same curved markings as this one (circled in red) and this one seems much thicker as well???

[anlauto]

I know you know they're not E Body parts, that's for certain. As for "what they would go to"...If they were mine, they would go in the circular file....but that's just me.....Throw them on eBay, you never know you could be sitting on a gold mine !

[Claudia]

  . . . circular file . . . that's funny! 
I'm not really a fan of eBay and doubt I would be able to retire off the sale of these three parts.