Purchased new from Map Camera last year. Used with a lens filter and stored in a dehumidified cabinet when not in use. No mold or clouding. There is one small piece of dust visible when light is shone on the lens, but it does not affect the photos. Although X mount is selected due to the app's specifications, it is actually Leica M mount. As a bonus, I will include a 43mm lens filter (the one I was using) purchased from Map Camera.