The Gross Vehicle Weight (GVW) for older trucks/pickups varies from state to state. Some time around 1937/38 GM and some of the other light truck manufactures started to put GVW tags on their vehicles, Ford did not.
Some states require the unladen weight to be listed on the registration, and the GVW posted on the exterior of the vehicle. This applies to all light and heavy duty trucks.
Most states license commercial vehicles by the unladen and GVW..
If there is a weight shown on the vehicle registration, it might be to your advantage to get a certified weight slip on the vehicle.
Generally speaking a pre 1949 1/2 ton pickup will weigh under 3,500 lbs with a GVW rating of 4,700 lb. A pre '41 1/2 ton will barely break 3,K.
It is very common to find commercial pickups that have a weight in excess of 4.5K shown on the registration, this happens when the truck was sold new and was equipped with special equipment that added to the weight. As time went bye, the special equipment was removed, making the truck lighter and thereby eligible for lower license fees.
I recently purchased a '64 Chevy C10, the weight on the registration was shown as being 4.5K with a GVW of 10K.. The factory weight tags were not attached to the cab. I called the man I had bought the truck from, asking the question about the missing tags and if the truck was a C10 pickup when he bought it.
Interesting reply; the truck was originally a 1 ton C30 dually flat bed, the previous owner had taken the stake bed off of the truck, adding a 8' pickup box and flared rear fenders.
The man I bought the truck from switched the dually axle for a GM 10 bolt, shortened the frame, installed a 6ft bed and removed the C30 emblems from the cab.
Neither of the previous owners had given any thought to the weight and the amount of money they were paying in fees for weight the truck no longer had.
I had the truck re-weighed, the unladen went down to 3.5K with a GVW of 4,700. The annual fees went down by $75.
I guess the moral of this story is... Assume nothing..