Hi all. My M6 TTL is a brand new (new old stock) purchased last week. The camera is indeed pristine, with box and all papers etc, but today I noticed something weird at the finder window (on the inside), which initially looked like fog, but after using a flashlight to have a closer look, it seems to be something else. Can anybody tell what it is? The small white spot in the center is what makes me suspect it could be some kind of 'mushroom' - Also, it seems slightly -again, slightly- foggy on the inner side of that glass face, just where the spots are. Picture below.