This sale is for a fully working and mechanically perfect Mamiya RZ67 140mm f4.5 Z macro lens, equivalent to about 67mm in 135 format.
This lens has only normal minor signs of use cosmetically, but there is quite obvious dust inside. This is not severe and is very unlikely to affect any images except maybe a little if shooting directly into the sun. Otherwise the glass is very clean – no fungus, haze, scratches or separation. This is still a nice lens, although not a perfect one. Very very usable. Very cheap because of the dust inside.