We have a VAO-15 that was bought new by my father-in-law in 1956, one of the last VA's made.
It is a straddle mount and has a adjustable front axle (round tube). Exhaust is underneath and it has an eagle hitch. We have the original Case 2-14 plow, disk, sickle bar mower, and rear trip bucket that was bought with it. I guess you could call the VAO-15 kind of a row crop/vineyard version of a low profile orchard tractor. It was orginally used on the farm when it was a dairy, and has been used with row crops to cultivate, etc. Nice tractor, and in my opinion was very competitive to Fords and Ferguson of that era. Our plan is to keep it in the family for the next 51 years!