Antique Pin has chinese/japanese symbols that need translating

Hi, I have an antique peacock pin that was given to me by my grandmother and she was given it by her great great grandmother. On the back of this peacock pin are 4 either japanese or chinese symbols which I would like translated if possible so I can learn of the history of this item my grandmother held so dearly and really wanted me to have it. I have taken pictures of the item and uploaded them to the following site:

http://i.imgur.com/cDs00sj.jpg

Thank You so very much for your assistance. So far I have not been able to find anything on the internet about the pin. Can offer Paypal if you are asking or simply to show my appreciation. Thanks again.