This should be an easy one. I've determined that this precancel must be (through process of elimination) a Type 232, but I'm puzzled by the fact that is uses a comma at the end of the city name. Other examples of Type 232 do not show use a comma.

Was there any rhyme or reason to using vs. not using the comma after the city name or was it left to the individual location to use it/not use it as they please?