This filter is designed to be attached to the rangefinder window of a Barnack Leica to enhance contrast and make it easier to align the double image. Genuine Leica product. This one is for DⅡ, DⅢ, and Ⅲa models. Please note that it cannot be attached to models from Ⅲb onwards. It's an old item, so it has some signs of wear and tear due to age, but there are no noticeable scratches and it functions without any problems. It comes with the Leica logo case that it came with when purchased. ※The camera in the image is an example of it being attached. The camera is not included. 【Shipping】 Shipped via Click Post. ※If paying by "convenience store payment" or "bank transfer," please purchase only if you can pay within 24 hours.