WWI German military issued PO8 Luger holster

This is a First World War German military issued PO8 Luger holster. It was made by N. Burghard Pasing in 1918. On the inside it is unit marked and although only now partly visible this looks to be "BA 19"  19th Bavarian Artillery? The holster shows signs of significant use and has had the flap tang replaced at some stage. Many of these Great War holsters that survived were used again during WWII.