This appears to be a standard model 443 not 443A. It probably had the three on the tree and converted to stick in the floor, a much better option. The three tree will get bound up when in uneven conditions. The standard models came with 3/4 inch rollers instead of the one inch on the 443A model. I can not comment on the track adjusters, but have seen some on other machines. So pontoons may have been changed at some point in it's life. Looks pretty clean body wise. There are several modifications done to it if you are looking to restore to factory conditions, but doable, needs factory speedo. If the tracks and rollers are good, the price is reasonable. I wouldn't have a Sno-Cat, but two, yes.