Back in the day I sold 20 of those lenses to a government agency. They took the glass out of the lenses and threw away half of the barrels before I found out what they were doing. I got the other half. It was several years before I could find out what they were doing with the glass but I finally learned that they were working on prototype heads-up displays.
Nikon USA had to order the lenses specially built for the PO that I gave them as they were only making one or two a year before I got the big order.
Fuji X Pro 1,XT 1and XF1 cameras and lenses.
Leica M6 with black Wetzlar 50mm
A pair of Barnack Anniversary cameras
Who knows how many others