@angleina, first welcome to CCF. Second, while often times missing design elements can be an indication that a coin was struck through a grease-filled die, in your case this coin looks like one side has been preferentially worn down as the obv rim is missing as well. I'm not 100% sure about this and will be interested to read what others think as they weigh in on this thread.
"The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz