BLOODY-WELL FOUND IT!!!!!!!!
I've asked a couple of times, on this and the previous message board about Australian issue of P08 Lugers (see above). Well I was poking around on the net this afternoon and found a reference of Australian "Z" Force units in the Pacific using Lugers!
It's “Activities of Alex Hawkins in Z special Unit 1944/45" at
http://www.grantsmilitaria.com/garrett/html/z_spec.htm
I am stoked! I think this may explain the "Dad and Dave Industries" marking on my LP08!
Any thoughts folks.