[Lugers down under]

Hello guys,
In my never ending search for interesting Lugers here down under. yesterday I found (aquired) an interesting 1918 Erfurt double date (1920) which is obviously a rework and has the police sear safety bar fitted.
It is all matching numbers including the magazine which is a Hanel Schmeisser patent mag?????
It has a holster with a spare mag and tool (WW1 proof) and a spare mag which is also interesting insomuch that it is an early nickel plated mag with a wooden base which is numbered 2714 in the early large number style with the numbers running length-wise along the base and on the front base face has a crown/M stamp but no other stamps.
The mag does NOT have concentric circles which I would have expected if it had been a Navy mag.
The holster is stamped L.Z.A over a large winged eagle with a little crown on it's head which is turned to the left and the eagle's claws are gripping something that looks like a branch or a rifle. The eagle is about a half inch wide.
Below that is the letters "H.Berlin."
Unfortunatly, I am away from my home and my books so I cannot identify any of the marks.
The front gripstap on the Luger looks like it once had a unit mark which has been removed but the reflections of the original stamps are evident on the inside of the mag well.
I would be interested in what you have to offer.
I will try and post some photos.
Kind wishes,
Murray