It's 1991, It was imported from Oz a number of years ago, a great workhorse.

Bend in exhaust forward i think (not a problem in Ireland) less risk of damage/igniting crops behind u
I was an original member of Zetorworld years ago,excellent forum, easier to work then' "I think", I older now
It helped me keep some of these older models 1972-3511, 1979-6911 going, the 4911 calved,thru out a conrod, wrong torque !
A few additions since, 7211,7245,7745 & a beaut 7340T