The last version of this very rare 2000mm Nikkor lens, the largest ever built Nikkor for 35mm, built-in L37c filters, in near mint condition with both original caps and AY-1 tripod mounting unit, the lens (total weight 25kg) was shown at Photokina 1970 for the first time, the second version with improved coating came in 1975 on the market - only very few of these lenses were made by special order only.