I have yet to see any examples of that; the motor will merely run slightly faster which is not signifigant except for mechanical clocks, timeswitches and some turntables & tape decks.
The shaded-pole motors fitted to older turntables were intended to be run on either 50 or 60Hz with just a change of pulley to adjust the turntable to the correct speed.
I wouldn't have thought that the very similar style shaded-pole motor used for a small fan is going to be that much different.
