Ouch! I thought it was rare.
I was Told It's a 1936 model, I knew it wasn't because it has a vertical and not a sloper cylinder and because the oil filter under the oil pump incorporated in the timing cover.
Graham Scarth informed me the engine number which is L11409 is a 570cc SV WD Model L was dispatched from Reddich in August 1940.
Sadly all I have is the motor, complete with carby and MagDyn and only needing minor repairs to get running
I wonder how this lovely old thumper ended up an orphan in Australia.
