Interesting. I'm a million miles miles away (Gordons Bay, nr Cape Town) and get the same ply from our local mill. Supply is erratic, so buy 20-30 whenever a new shipment arrives. Label is identical,except ours is used for importing grape concentrate. Doing the conversion, cost is about $7.50 a sheet. Cheap!. Very distinctive smell. Use it whenever I can. Jigs, bunkbed slats, kids table tops and the like.
Our guess is that is a poplar species (aka cottonwood, boxwood). Will make a point of asking the mill if they can establish what wood it is. Will pm you if I get an answer.