Got it! It's an MC (4000 lbs) serial number 8183861. As an MC, it must be a 1937, right? Also, can anyone tell me when during the production year it was built? One last thing, was any distinction made among the body styles in the serial numbers? I understand that the firewall tag is the body ID, and I don't have that yet. One thing I would like to know is how many of the canopy-style open pickups were produced that year. I assume that they're rare, but I wonder how rare. Thanks, Bigmountain