The "Con" rating means continuous duty. However bear in mind that it only consumes 1.15 horsepower of electricity, and those commutator motors are not efficient, so it is only about a 3/4 hp mower: don't expect it to handle anything but light trimming if the grass is dense. It may be a home conversion from a 2 stroke engine, I can't imagine why anyone would build a 3/4 hp electric mower with a 19" cut, except for largely ceremonial purposes like the battery mowers that are sold currently. I recall some commutator motor electric mowers from the early 1950s, but they were only 12" (and pretty useless anyway).
