Well, the tank date is pretty clear.
The frame (engine) number is stamped on the frame.
I used this link to come up with the 1-29-29 assembly date.
http://www.modelahouse.com/cgi-bin/enumbers/numdate
Perhaps the link data base is in error.
The Denver assembly plant is only a guess, based on the 29 Tudor's tank date and assembly code. The code on the Tudor appears to have a date of 2-29 stamped along with the assembly number....
My ccpu has no assembly plant code
It's entirely possible that the truck was assembled in February 1929...but there is nothing to confirm that.