Needless to say , the best 50 mm in the world n the best Leica len : Noctilux-M 50 0.95 ASPH 11602 . Full set ( United Kingdom goods ) in almost mint condition . Comes w Leica E60 filter too ! Test w M9P n especially tested the floating elements of 0.95.
https://www.stevehuffphoto.com/2009/12/09/the-leica-50-noctilux-f-0-95-lens-review/
https://www.overgaard.dk/leica-50mm-Noctilux-M-ASPH-f-095.html