A rare Kern Switar 50mm 1.8 AR . One of the best Cinema Len and standard 50mm in the world . SN 513372 dated 1952 second version . Not Macro version but w infinite and more convenience for normal use . 螢石鏡頭Plus APO in military standard . Original n nice coating . Made in Switzerland. Test w M9P. A collector’s must item . Len only w 38-40.5 mm range n 40.5 mm filter . Alpa-LM coupling adaptor and back cover .

https://oldlens.jp/switar50mmf18/

https://www.dcfever.com/trading/view.php?id=10880098