Yes, my parents! This was back in the 1950-60s. Parents were professors and travelled overseas for work, sometimes to give lectures and the like, sometimes in the field (botanists). Can't remember the brand. It was black I think, with gold letters on the keys, and had a cover/case. Can remember watching my mother change the fiddly ribbons. Back then the overhead compartments were much smaller but people didn't carry everything as a carry-on. My father would wrap it in his coat and tuck it away very carefully, watching it like a hawk at any turbulence. We had a full-sized one at home that weighed a ton, so it was rarely moved. I really wanted the portable one as a toy, which eight-year-old me figured was fair as they had the big one. LOL