Nikon S2 & 50mm f1.4

Year of Manufacture:  From 1955
Features include:  
       A bright, life-size 1:1 viewfinder 
       Lever film advance (earlier Nikon models used an awkward knob)
       Lever rewind (again, earlier models used a rewind knob)
       1/1000 second top shutter speed (compared to 1/500 on previous models)
       Improved flare baffling in film chamber
       A single bottom opening key, making it easier to change film