Just downloaded the big image of the lens, and indeed the seal says "State of Qatar."
I think you have that one right, and there is good reason to believe that we might now have a good idea of who is the new owner. Around 2002/3 time there was a special commissioned Leica M7 Titanium with five lenses, different in that everything was made from Titanium. There was a nice article about this camera in LFI 6/2003. The new owner of that system is His Excellence Sheikh Saoud Bin Mohammed Bin Ali al-Thani, founding Chairman of the Qatar National Council for Culture, Arts & Heritage. Seems to me he would be the best guess for owning that Zeiss monster lens.
I've been everywhere ooooohhh yeaahhhh still I'm standing tall.
Any chance of an f1 model?
"He took to writing poetry and visiting the elves: and though many shook their heads and touched their foreheads and said 'Poor old Baggins!' and though few believed any of his tales, he remained very happy till the end of his days, and those were extraordinarily long "- JRR Tolkien, ' The Hobbit '.