Have been trading some nice emails with the seller.
This holster is Ordnance marked and is dated '43; which predates the use of the SIG semi-auto by the Swiss.
The seller is having a friend bring over a Swiss luger magazine to see if it will fit in the magazine pouch. If it does, it might be a late variation of a holster for Swiss ordnance lugers. Seller says this type was used for lugers in the 1943 to 1973 timeframe.
In the French booklet titled "Le Luger Un Pistolet de Legende, No. 9" on page 64 a photo shows this type of Swiss holster. Caption says they were commercial holsters...
The impression of the gun inside the holster, as shown in the seller's ad photo, does not appear to be the grip/magazine impression of a luger IMHO...so, some what of a mystery...see photo, below :
Stay tuned for more details...
p.s. Here is a SIG rig photo from the FGS, Inc. web site...I think this holster on e-Bay looks identical to the one in the FGS photo...
Regards,
Pete... <img border="0" alt="[typing]" title="" src="graemlins/yltype.gif" />