Carl Zeiss Jena MC Flektogon 50 f:4

Wide Angle Prime Lens, Pentacon SIX mount.

Serial number 8168. Made in Germany, DDR

In my opinion, the lens has not been used. There are scratches on the surface from contact with another object. They are marked with red arrows in one of the pictures.

Focus ring is nice and smooth.

Aperture blades are snappy at all settings.

There is no oil or rust on aperture blades.

Optic is very well. No fungus, no haze, no cleaning marks. 

Filter thread is intact and accepts filters properly.

Lens comes with original case and rear cap. 

Please check images for more details.