I scanned this from a book I have called “Automotive Reflections” by Lloyd Van Horn.
Made in 1910 by the Grover Traction Truck company it sure looks like this is the company that made the truck.
Although the truck has some differences the similarities are too numerous to dismiss especially the unusual drive mechanism, a different model or prototype maybe?
This book has the only reference to the Grover Traction Truck Company that I could find anywhere and the only vehicle I’ve ever seen with type of drive mechanism.