Kinda defies the whole Leica stealth and portability thing. The lens probably weights three times as much as the camera.

Emil/Gandolfi if you're really interested in acquiring such lenses there are some super high speed X-ray lenses that probably can adaptes to Leica mount and cost a lot less.
It might only be a 65mm lens but it also only costs 290 Euros Or a 90mm lens for a mere 499 $ on the bay Thom A from the Rangefinderforum has adapted a Leitz 1.0/90 X-Ray lens for a picker to m mount the lens goes for about 800 $ on ebay. 75 000 is probably the Leicashop/Westlicht Bonus.

Benjiboy they probably need the lens for surveillance of Radar screens or a General's wife.