De Havilland Australia produced the Mosquito for the RAAF during the war, the first (A52-1) taking to the air at Bankstown, Sydney (NSW), on 23 July 1943.
This from 'Aeroplane Monthly' (January 2017) on the wood used in DHA manufacture:
All spruce and balsa for the primary structure was imported, but Australian timber was employed in many elements of the secondary structure. Initially, it was planned to use local coachwood ply in the wing skins and spar webs. This decision was later reversed, as related by Merv Waghorn, an engineer seconded from Hatfield who was delegated to make design changes: "The shear strength and shear (modulus) tests I did on coachwood demonstrated that, although it met the same specifications as (4 x 3) birch ply, it could not match (the) results achieved on birch ply at Hatfield using identical test conditions. I therefore made the decision to increase the spar web thickness for coachwood, the first major modification to the Mosquito developed in Australia.
"This proved to cause problems because it reduced the chordwise dimensions of the space into which the wing tanks were fitted and required reduction of the chordwise dimension of the tank doors, so that they were not interchangable with those on English and Canadian Mosquitos and made them hard to install. Before production was under way, the plan of using coachwood was abandoned and we used imported birch ply throughout, so the whole modification was unnecessary".