Registered to IBM International and based in Europe at the time. This was the era of the main-frame computer and IBM had a big chunk of the market. Another big player was IT & T which had Gulfstream N720G, also based in Europe. Both were commonly heard on airways.
This photo is copyright © Tim Martin, and may not be used or published in any way without permission.
It was added on 25 July 2020, and has since been viewed 264 times.
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