Think I found this link on ECN some months ago:
http://www.henkpasman.com/id1.html

Living in the Carribean he's sort of a specialized in 50/60Hz questions.

He says (in Dutch):
Airco, Koelkast en Wasmachine altijd kopen in
230 Volt 50 Hertz uitvoering.

Which means in his context: always keep to the correct frequency and voltage when buying AC, fridge or washing machine.