This is a very rare gold version of the Camden 500. When I purchased a 500 chassis from the company while living in the home country, it was included with a gold slip of paper that said, "Congratulations! Please use it." It is not generally sold and seems to be obtainable only by chance when purchasing a chassis. It appears to be quite rare, as it doesn't even show up in searches. I used it once to confirm its operation, but it is otherwise unused. I haven't even attached the mounting screws, so there are no scratches. This is an auction for the main unit only. Since the operation has been confirmed, please understand that it is non-refundable and non-returnable (NCNR).