Hi CRC I have a 1 1/2 ton chev R/H drive that was brought to Australia durin ww11 as part of the lend lease program and was sold after the war finnished.
It didnt have any GVM numbers either, but the people who brought the truck put there name on a plate behind driver door and the GVM weight was 11,000 pounds 5 to 6 TON
I have just finnished restoring my truck but left the body all orignal as it is good shape
Cheers Justin