The endorsement used to be for high-performance aircraft meaning EITHER more than 200HP or controllable prop, flaps, and retractable gear. I suspect it went on the books in that form in 1973 (at least, might be older than that). In 1997, due to a lot of carping of various nitpickers about aircraft that only have one of those cases, they split it into an separate HP (>200HP) and complex endorsements. Since I logged PIC time prior to the last time the regs changed, I don't need the endorsement.
The High Altitude and Tailwheel endorsements came later 1991? They are not in my 1986 FAR copy.