This is the Bulldozer from Win 10 3D Builder, as in the CGCookie lesson [Exporting Objects](https://cgcookie.com/lesson/exporting-objects).
At the time of this writing (20190820) I am using Blender 2.80 for which the Sketchfab Exporter is not yet available. Fortunately someone took time and effort to make ["The Unofficial Sketchfab Exporter for Blender 2.8"](https://cgcookie.com/t/1944-the-unofficial-sketchfab-exporter-for-blender-2-8) available. It works! Thanks! :)