Very unique and very vintage Mint 1st Gen Oakley Mumbo M Frames.  These feature crystal black frames with Black Iridium Heater Lens.  These are easily 30+ years old and are in mint condition.  There are no scratches and as you can see in the pictures, the hinges are intact (and tight).  Typically, the hinges break due to brittleness of age.  These ones are amazing in every way.

No box, but you will receive the original Microfiber bag which say "Plutonite Lenses" on it.   Don't wait as these won't last