New member with a question on a 1937 P08

[Deputywood]

First Post, so I'll introduce myself. I'm a 70 yoa retired 1SG, US Army, and a retired LEO. Now I'm just retired. My main interest is not the P08 though. I normally can be found on the Silhouette range shooting BPCR. I've always been interested in the Luger and finally bit the bullet and purchased a two/fer several years ago. I kept the 1937 Mauser and sold the 1920 Commercial. No regrets as the sale almost covered the cost I paid for the two. The Mauser is 100% matching including one matching mag. It also came with a 1936 dated holster and tool. I'll post pictures. Thise is my first Luger.

The question relates to the holster. In the bottom of the holster, I see a patch of cloth. I have been told not to remove it and so have not. Is there any significance to this cloth? Look closely at photo number five. This is the inside of the holster.

Woody