P60-m42 Adapter Pentacon 6 Kiev 60 Lens To M42 Screw Mount Adapter Pentacon- m42 - Lens Adapter - AliExpress
Amazon.com : K&F Concept Lens Mount Adapter Compatible with Pentacon 6 Kiev 60 Lens to Nikon AI F Mount Camera D90 D300 D700 D7100 D7000 (Pentacon-Nikon) : Electronics