Cool use of graphics for your reply. I also have a 1966 (that’s right, 1966) Smith-Corona electric portable typewriter that still mostly works. I’ve thought about the possibility of taking the Curta on a flight but decided against it because it looks a lot too much like some kind of a sophisticated terrorist grenade. In fact, if I offered to operate it to show what it actually was, I’d probably have five ot six security personnel jump me and call the bomb squad.