This is an early, rare item bearing the "M-SYSTEM" name, before Leica filed a claim and it was renamed "OM-SYSTEM." [Appearance] There are some minor scratches, but it's in good condition (please check the images for confirmation). [Optics] Some dust is visible, but I don't think there's any mold. When looking through with a strong LED light, there appears to be a very slight, thin haze on the front element. I have never felt it affected my photos. [Operation] There are no functional problems, such as the opening and closing of the aperture blades and the operation of the focus ring. Infinity focus confirmed. [Included Accessories] Front and rear caps (third-party) Instant purchase OK Stored in a dehumidified cabinet Focal length...151-200mm Maximum aperture...2.9-4