Pentacon SIX TL medium format camera metered Prism. Made in East Germany before the wall came down. This is a metered Prism in very good condition, all working, tested, new battery. This is not a TTL head, to use it its called a stopdown reading. This was made before the days of TTL. You push the stop down button on the lens and turn the dial on the top panel until the meter centres. It sound odd but thats how it was years ago. It has a eye piece shutter on the back to stop odd light readings. on off switch. New PX625 battery.  Look at some you tube videos on how the use it. The glass is fine and works well just as a prism on the Pentacon Six TL camera, see other listings for the camera and case. The listing is just for the prism. Price is £84.00 post free to UK only.