toning beauty is in the eye of the beholder. could be valueable to someone out there. not sure how much. do NOT clean it.
At first sight I like the toning, especially the bell side. Could you take better pics? As told: No cleaning!
It would better if you took the coin out of the 2x2 then take your photos. you could then use photoscape ( it's free) to do a round crop of the coin.