67’ xr7 dash cluster rubber washer

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I found this washer after taking the speed nut off by feel. Is it homemade?
Also, does anyone recognize the other piece? I found it on the drivers floor mat.Processing: 4C1E7EC3-95A5-470D-A482-ABD9CA5F0077.jpeg…

I tried uploading again and pictures won’t come through. So basically it’s a little square rubber piece like from a bicycle inner tube, with 2 slits that form a cross in the middle.

I accessed it through the ash tray. There is a stud on the back of the cluster for the washer and nut. It’s a minor detail and great idea!