If that is from Beer's (Aurora Guide author) collection of Esposito's cars (Tyco Guide author) it's more than likely the real deal, not sure about it being a US-1
Stomper prototype though.
That step-side pick-up body with the raised bed and the side mounting clips was only used for the US-1
Stomper pick-ups as far as I know, probably why they think it's US-1. The
Smith's Tire US-1 truck and the white #7 regular Tyco wide body slot car truck are the only other ones that used that raised bed body but without the raised side clips. I made those clips for bodies for the
Stomper US-1 chassis I have.
The more likely possibility is that it is a
Stomper but the one they never made, it wasn't US-1 and a prototype is in the Esposito guide. It's red with that truck body with the raised side mounting clips, it needed to be higher because it has those big knobby Tyco Hopper
tires. It also has a Nissan bandit front light bar across the grill and headlights and a Nissan bandit rollbar with one of those Hopper
tires mounted as a spare on it. The truck for sale has the bigger Nissan Bandit
tires, it also has pockets molded into the rear of the bed? My
Smith's Tire and #7 truck don't have those. I would guess they're for mounting the Nissan roll bar they were going to use, it has mounts in the rear, if so maybe it's real but has nothing to do with US-1 other than the Tyco/
Stomper tie-in. They already made a US-1
Stomper so why do another, this was probably gong to be for a 440X2 or whatever chassis Baja racer type set like the Nissan Bandits that never happened if I were to guess.