This is a genuine adapter for mounting CONTAX SLR lenses on G1/G2 bodies. It's in excellent condition with almost no signs of use. I've listed it as junk because I sold my G1 body before I could test it with a CONTAX lens. However, I purchased this adapter around the same time and stored it under the same conditions as my G series bodies and lenses, all of which function perfectly. So, I believe it's a great deal. However, I cannot guarantee its functionality, so please understand that this is a used item. - Model Name: CONTAX MOUNT ADAPTER GA-1 - Country of Manufacture: JAPAN - Compatibility: For Contax lenses - Color: Black - Features: Mount Adapter Included Accessories - Front cap - Rear cap Thank you for looking.