In desparate need of early model 71 dart fuel cap

What does it look like ?? I might have one and dont know it.

I guess i goofed i tried to answer this. So anyway what does it look loike ? I might have one and dont know it. Ive got a bunch laying around. show me a picture.

I've seen this type of question before and would like to see one of these also. Are either of these correct?

Gas Caps.jpg