CORPO,
Here's the break down on your serial number 21RD12 5817
21 = Janesville Plant (1=Flint, 2=Tarrytown, 14=Baltimore,etc.)
RD = 1936 1-1/2 ton Utility w/ 131" wheel base and Dual Wheels
12 = Built December 1935
5817 = Unit number starting at 1001 (you have the 4,817th RD built at Plant 21)
Note...the first 1936 RD from Janesville was built 10-8-35 and was serial number 21RD10 1001. The last RD from Janesville was built 8-21-36 and was serial number 21RD08 17321 for a total of 16,321 RD's built in Plant 21.
Mike B
