It would almost have to be off something that was fitted with a rear catcher of some sort. Or offered with one.

All the simplicity's ive seen have had side discharge.


I was thinking perhaps its off an westwood but then it would be orange.
Toro's are red, not sure if they did a heavy duty rear discharge.



Would make a great slasher.
With the belt angles set right you could put a 13hp Chonda horizontal shaft motor on it and it would cut just about anything.