You might also look for the B&L Series V f18, there was one for sale here the last tew days, not sure of the FL, also the Ross f16 version. They are the same Protar lens made under licence.
hello, thanks for your response. yes I am familiar with those B&L and Ross protars . but I need the original one made by Zeiss Jena . if you might locate any of these around , feel free to notify me...finders fees are always honored !