I have a B, and they are great little tractors. One big thing with these is they are LIGHT for how much power they have. You will lift the front end if you are not careful. I use a ~450lb box blade, and had to add 350# to the front end to keep it on the ground. Yours appears to be a later model, based on the torque tube having the threaded mounting holes. Which means it has the CE engine 125 cu. in. ~18-20 hp (same as a Model C and CA besides compression ratio). They are good motors, will run on almost anything gas-wise. A few things I learned after I bought mine, the gear ratios are goofy. 1st gear will get you up to 2.5 mph, which is pretty fast for some tasks (rototilling comes to mind), and 3rd will only take you to ~8 mph, which makes for LONG trips down the road. The steering gearbox can be a weak point. Make sure you drain the oil out of it (hopefully it still has oil, and not grease...) and replace it with good 80w140 gear oil. The steering gears do NOT like being dry, it will make steering very difficult, and eventually cause damage. Owners manuals/service manuals are available online. I'd grab a set of those, they are very helpful with fluid types/capacities and maintenance recommendations. It does NOT have live PTO/hydraulics, this can make using the three point a bit of a pain. If you are not aware, this means the PTO/hydraulics are only active when the clutch is released on the tractor. To lift the three point when stopped, you have to let the clutch out. If you are planning on doing any PTO work GET AN OVER-RUNNER CLUTCH!! PTO driven implements on a non-live PTO tractor will push the tractor forward, when you try and stop. Replacing the brake shoes is a NIGHTMARE, but well worth the effort. Parts are readily available, Allis made 125,000 of these little tractors, and they have a bit of a cult following. Other than that, they are wonderful machines as long as they are not pushed to hard, and you remain aware this tractor was built back before safety was a major concern. She can and will hurt you, if you get careless! Enjoy!