Glenn, the V was for "Victory". Introduced in 1939 for the 1940 model year. They came in VO orchard, V standard, VI industrial and VC row crop versions. You could get a VC with a single, tricycle or wide front end. They made them using a Clark transmission and a Continental engine. They were derated as they produced the same horsepower as an SC. Then, in 1942 the introduced the VA series. From 1942-1944 1/2 they used the VC steering and front end but a CASE designed Continental built engine, block #VT149. The VA was mostly made by CASE with the exception of the wheels and engine until 1946 when they changed to the VT328 block, flyweight governor, crank with counter weights, manifold, air cleaner, and a few other minor changes. In 1951 with 5570000 they completely redesigned the VA series. Wider dash, better steering, bigger gas tank, and more options in tire sizes and was also the introduction of the VAS, high crop offset tractor. In 1952 you could buy a VAC-11 single front, VAC-12 tricycle, VAC-13 adjustable wide front, VAC-14 same as 13 but low platform, VAO-15 orchard plus the VAS and VAH, as well as a VAI and VAIW which was a warehouse or plane tug. I have 7 of the VA series including a VAS and VAC-14 and I also have a 1941 VC.