DWM Luger Identification/Valuation

[docwisdom]

I recently received this gun from a family member. I was able to identify most of it, but would love any additional information.

Top:
DWM 1911

LH Side:
German Eagle Proof Stamp on slide
'G' is revealed when pulling back the slide
23 below the slide

Under Barrel:
5823
8, 82

Under barrel on frame:
5823

On Handle:
B.2.T.S..1.99.
(Bavarian, 2nd Battallion, Train, Field Signal, 1st Company, 99 Gun) as I have interpreted it.
Any historical information on who this unit was?

mag:
3067f
(cross or T stamp)

Thanks!