Nikon RF - the pinnacles Nikon S3 - S4 - SP Nikon S3 Nikon S4 Nikon SP BLACK - silk shutter It has been produced from 1957 to 1962 : about 22,300 Nikon SP were made. Only about 2,000 of these in black paint finish, the rest in chrome finish. Nikon SP BLACK - titanium foil shutter Nikon SP CHROME - silk shutter Nikon SP CHROME - titanium foil shutter return next