unusual navy holsters in picture ?

[lfid]

in a recently completed auction on ebay - no association ...
eBay item number:
360834308545

http://www.ebay.com/itm/360834308545...84.m1423.l2649


note that the luger holster/stock configurations on the three guys in picture look kind of like 6" navy holster but with magazine pouch located where the typical cleaning rod is located - and stocks look long for the holster length

also the closure tab seems anchored on left side of holster at an angle that then engages the stock overstrap on the holster

picture back has 1914 date and maybe these are german red cross troops - apparently not land marines

so if true this would be applicable to the pre WW1 navy issue luger it seems - ie lugers not dated 1916 or 1917

anybody know is this holster a known type ?
I dont recall seeing it in any of the various luger books

thanks
Bill