Hi Ruth, Here's a link with lots of ideas! https://www.google.com/search?q=hanging+wall+pocket+ideas&rlz=1C1CHBF_enUS781US781&tbm=isch&tbo=u&source=univ&sa=X&ved=2ahUKEwjN6om-0L3fAhUjiOAKHVmiCqMQsAR6BAgAEAE&biw=1600&bih=789
Hi Ruth, Command Hooks by 3M company would likely work very well for hanging your wall pocket. Or, possibly velcro.
If you mean an antique, porcelain wall pocket, it should have a pre drilled hole in the back to attach to a well embedded wall screw. If no hole exists, you'll need to suspend the pocket from leather or similar, securing it well to a wall hanger.