When I bought my M11 the seller offered this as part of the deal. It’s not something I’d use and I don’t think it’s for the M system anyways. No box but in pristine condition. Item is in the UK The Genuine Leica black leather holster 19577 is a rare and sought-after accessory designed specifically to fit the Leica Q, Q-P, Q2, and Q3 cameras. Made from high-quality leather, this padded holster provides a secure and stylish way to carry your camera in a convenient and easy-to-reach position. With its sleek black colour and precise fit, this holster is the perfect choice for Leica photographers looking to protect and carry their valuable equipment with modern style.
eBay