This neat piece was found at a local land fill (needle in a haystack) totally by accident tonight here Nova Scotia. I have never seen one before so any info on these pieces would be great. The embossing reads GOODYEARS / PAT. 186# (the # being either a 8 or a 5) with 3 X's ( X X X) embossed on the reverse side. I have done a search on ICON and got all the info available. Any additional info on if this patent date has been seen before, their use, rariety, where they were used, etc. would be greatly appreciated.

Thanks