...and also with the same strange code.
AKA "American Morse" or "Railroad Morse". Not International Morse as you'd usually hear on the ham bands. When I was a new ham I think there were some CW nets on the ham bands that used Railroad Morse, but I cannot recall hearing it on the ham bands in a long long time.
Some of the prosigns and abbreviations we use on the ham bands today have their roots in Railroad Morse. e.g. "BT overbar" for a "break" and "ES" for "and" are similar (not identical) to formally defined punctuation in railroad morse.