Very rare Leica LM ring, gold-plated, gold color, for sale. It's a notched (half-cut type), so removing this ring from an M-type body is very easy if you use a rear lens cap with three protrusions. (As shown in the last photo, the protrusions fit into the half-cut area, making it easy to remove from the body. Please note that the cap is not included in the product.) Also, it's a function to prevent interference when attaching old lenses with an infinity lock lever to new M-mount cameras (including digital Leicas). Specifically, it solves problems that occur with old lenses such as the Elmar 50mm F3.5 (collapsible/fixed), Elmar 3.5cm F3.5, and Summaron 35mm F3.5. I've collected many LM rings, both genuine and generic, but this one is rarely seen, made of brass with a gold-plated surface. There are also Soviet-made cheap gold-plated cameras often found with Leica Barnacks, but this ring is made with the precision of genuine or Japanese-made products. Looking from the back, it's made with such precision that you might mistake it for a Leica product. A Leica genuine LM ring weighs 12-13g, but this one weighs 12.5g. It's not a recent product, so I don't think it's made in China, but please refrain from purchasing if you are concerned. This LM ring is a must-have for Leica collectors. The L-L39-M is a mount adapter (LM ring) for using L39 mount lenses on Leica M mount cameras. Normally, the body is made of brass and chrome-plated for excellent texture and durability, and the mount part is processed with high precision. This one has gold plating on the surface instead of the usual chrome plating. It is unknown whether it is plated with real gold. Perhaps, the brass was left as is and the surface was not plated. However, it is a very beautiful gold color, so I think it is plated. Please refrain from purchasing if you are concerned. 《Reference》 LM rings come in three types, "for 28/90mm", "for 35/135mm", and "for 50/75mm", depending on the focal length of the lens. When using it with mirrorless single-lens reflex cameras and other models that do not support bright frames, you can use any of them regardless of the focal length. How about it for Nikon and Hasselblad fans, as well as Leica fans?