[quote=sdrealtor]The prior homeowner was a construction worker and I beleive he drove a back hoe. Perhaps it was some sort of removable padded backrest for his backhoe.[/quote]

I was thinking along the lines of a motorcycle backrest, but this frame is so square and boxy I started to discount that idea.

A backhoe makes more sense…they don’t spend much time making backhoe seats look sexy.