NIKON KIU
Did you say Nippon Kogaku?
Link along with auction house description;
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Auctions

Nikon ED Nikkor 1200-1700mm
f/5.6-8 P IF (ca. 1996)
Hammer Price 425.000 Euro incl. premiumIn May 1989, Nikon started developing the lens offered here and thus reacted to the super telephoto 1200 mm f/5.6 lens presented by Canon around 1980.
With this 1200-1700 mm lens, Nikon offered the longest available focal length of all zoom lenses for the 35 mm format. The prototype was first used in 1990 in the Koshien Stadium in Amagasaki. In order to capture the athletes in the middle of the stadium from the press seats, focal lengths of 1200 mm were required for overview and 1700 mm for portrait shots. Nikon later delivered these lenses to news agencies worldwide. From 1994, Nikon also made this 16 kg lens available to the general market, produced on special order only.
In total, not more than 35 units were made. Never offered at auction before!
…………
I believe this is the record price for any Nikkor Lens.
Kiu