One of the most important Nikon RF cameras, the S2-E was the first Nikon for electric motor drive and also the most early 35mm post-war camera for electric motor drive (before Leica MP-2). Only 4-5 cameras (out of 10-15 produced) are known to exist. The recently discovered black paint camera is in very fine condition and comes with black paint Nikkor-S 1.4/5cm no.396570, black everready case - camera no.6194009 (sold in Westlicht Photographica Auction 18) is published in 'The Complete Nikon Rangefinder System' by Robert R. Rotoloni page 110-115