Lens Mount Adapter for M39 Lens on M42 Thread
With the help of this adapter ring you can mount M39 lenses (e.g. Leica L or Zunow) on camera bodies or lens adapters with a M42 thread.

Technical details:
Material: anodized aluminum

Note:

Please make sure that the side with the indentation points to the lens. That way it’s easier to remove the lens mount adapter from the M42 thread. (You may need a tool.)