Darn! I wrote three paragraphs to tell Ron why I believe that this is a leather holster and then pushed the wrong button and lost it all.
Summary. I think the layers seen above (looks like 3) are too few for an ersatz holster. The few that I have examined had multiple layers, many more than three. I think what we are seeing is an optical illusion in the photos that is the result of thin leather that has been very sharply cut and the top and bottom edges have freyed slightly due to aging and that makes the solid leather in the center that hasn't freyed look like a sandwiched layer.
Patrice, can you confirm if this is leather or not? Inquiring minds want to know.