First off, I'm new to the forum & to 3100 trucks so forgive me for asking a question that may have been covered many times...
I'm purchasing a 1952 3100. The tag on the driver door pillar is stamped KBM ###### which appears to be an engine serial #. Did they use engine #'s in 1952 for the number on the door tag?

Looking at sites to decode a VIN this tag doesn't match the format but does match an engine number format. BTW, this truck has a replacement 235 c.i.

Thanks!