So bad I can't see any details on the reverse with out evasive cleaning. Is this a exception where cleaning a coin might be better? Metal detector find.
Judging from the photo at some angles it looks like a 3. At other angles it looks like a 2. Can you post a clear large photo of the date? If you can determine that it's definitely a 1922, more experienced members can advise you on whether it's worth it or not to send it to a professional coin conservationist. (NGC or PCGS).