Your truck has one of those unusual serial numbers that could point to one of a number of manufacturers.....if the number above is correct, it was probably built by the Lansing Division of White (aka Reo Motors in about 1961-62. But at this point that doesn't really constitute more than an educated guess -reinforced by the lack of mesh stone guard, headlights mounted on separate plates.
Take a look at the frame rails (either side) under the front fenders and find the VIN embossed therein, and post said number. It could be just forward of the front axle centerline on the driver's side, or just behind the front axle centerline on the other side.
Verify that it matches the number above exactly. (No "M" prefix nor a four digit prefix, such as 0125) sone trucks even have the date of manufacture stamped in the frame rail by the VIN. Confirm or correct the number posted, and I'll start digging through files to try to pin it down for you.
While you're at it, let us know if the right rear engine mount is riveted in place, or bolted.
Regards,
David