Please forgive my ignorance, I was under the impression that all PTO's turn the same direction. But the blades on my Quick Attach brush mower have a cutting edge on both sides of the blade. And they cannot be turned over to use the other side since that would place the downward bend on the blades pointing up. Are there tractors out there that have a reverse gear for the PTO?
Ah the old which one spins the "right" way......99% do turn the "right way" but there are those that do not!
I am not sure to all that fit, but the B6000e is one of the "reversed" pto models - it spins CCW. There are others too, many people find them, then get 'em home only to find that they need a reversing kit or the "right" mower to do what they wanted to do in the first place!
http://www.tractordata.com/farm-tractors/001/2/6/1268-kubota-b6000.html
This type of model is one that is called "gray market" tractor, they are ones that were not made for the USA market - typically for japan or other markets. These type of tractors did not meet the US stricker safety laws.
maybe a company designed the blades to fit either - if so - someone was on their toes!