It's Mascot and a DAP Beaufort - well done Cuefaye!
The caption to the photo reads "Beaufort T9541, the first aircraft assembled at the Dept of Aircraft Production's GAF at Mascot, taking off on its first flight on 20 October 1941." Actually I rather think it's landing. It's using the old 12/30 runway, traces of which could still be seen in the 1970's as a taxiway before it was swallowed up by what was then the Ansett tarmac/terminal/aerobridges etc.
Over to you....