Rare Olympus OM 80mm f4 Pre Set Bellow Macro Lens Excellent

Uncommon Olympus Macro lens
This is a preset lens meant to be used with bellows
There is no helicoid so the lens can NOT be focused without bellows
Lens is in excellent condition no scratches, fungus, or haze
Very minor internal dust
Aperture works well as it should
Comes with front and rear caps