How to open a 3 speed fan switch

[phebebeloved]

i have a westinghouse 3-speed fan switch # 77021, and trying to replace my old switch. having a problem trying to open it. somebody help please.

 

[george_66]

If it doesn't have any screws in it holding it together, you may need to take a small flatblade screwdriver and carefully pry the edges apart. It may have small locking tabs inside at intervals. Also check to see if there are any stickers that may be covering screws.