Hey trakloader, please fire me a PM. Been trying to email you but keep getting bounced - perhaps you've changed email addresses?
Good one on this truck. I've been intrigued by it ever since I saw it in a photo taken during its days in Hope. I've done some looking around and while my first thought was also Sterling I have another theory. I'm probably out to lunch on this but the other company that made heavy duty chain drives just before WW2 was Hug. They made one which was designed as an off-road heavy dump truck, mainly to aid in the building of dams across the US. I've seen other photos of this old truck from its days with Silver Skagit and it looks similar, albeit a little smaller, to the Hug 98MB, but with a full cab. One of the big similarities for me is the drivers side platform and grab rail and ladder. The basic fender shape is also very close to the Hug truck design. Given that the truck was pretty well used even in the late 40's photos in Hope, it could possibly be a pre-WW2 truck. Also, the Siver Skagit company was formed to log the basin prior to flooding for the Ross Dam. I've seen a photo of a similar, if not the same, truck with a large rock box on it which was working the dam site. So perhaps this was an old dump truck originally bought from another dam site with the box removed. That would account for its short frame. Its all speculation but given the time frame - the late 40's- and the limited number of companies building heavy duty chain drives at the time I don't think it is out of the realm of possibility.