it is possible if the transform primary coil allows to switch the point of input. There are some transforms that allows you to select the input point for 110 volts or 220 volts, only by taken more spirals from the coil.
The mainly trouble are that transforms are only one of the things of the power supply, there is a totally amount of components that are designed for example to get out the curly of the dc current, for example caps, that are calculated for a 60 cycles and not for 50 cycles.
If the transforms allow you to switch, maybe you must to take paper, pencils and your casio and do some calculations to replace the componentes for the correct values for 50 Hz