50 and 60 Hertz, what is the visible effect?
Some type of motors (synchronous, shaded pole, split-phase etc.) will operate 20% faster on 60Hz as compared to 50Hz, with somewhat less torque. 

Others, such as the universal motors used in small appliances don't really care so long as the voltage is okay. The higher frequency is unlikely to cause such appliances to significantly misbehave.