Could be, but those latches on the side board were not commonly fitted to Series Landrover trays, and the headboard is not typical either. By the time of Stage 1, most tray bodies for traybacks were supplied by Rover/Leyland (whatever was the current name) in Sydney, and this is not one of them. Having said that, they were always available as a cab/chassis and a different tray was sometimes fitted by a state distributor, a dealer, or even an owner.
The factory supplied tray had different latches, and the headboard was rectangular with horizontal bars made from U-section steel about 7cm wide and 2.5cm deep, very different from that.
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol