Found Coin. Looks Old. Need Translation.

[AllOtherNamesWereTaken]

So I found another coin while walking and this one looks a lot older than the other one. It has some build up on it but some of the characters are still visible. I was hoping someone here could help me with a translation to let me know the history of this coin such as when it was made? Thanks

[Theophania]

It looks very old,I also got some coins from ancient times were given by my grandmother,I cannot read those 4 汉字clearly.

[aone]

Just as attached - 

 

聖TOP

宋RIGHT

元BOTTOM

寶LEFT

 

Correction is appreciated, if I am wrong.

[AllOtherNamesWereTaken]

Thanks for the translation. I did some research with the translation you gave me, and I found that it's from the Northern Song Dynasty. Is that right? Cause if it is, that means the coin is at least 800 years old. Could the coin actually be 800 years old or more?

[aone]

Bingo~ it could be more than 800 years.

[imron]

Or it could be a replica coin that is only a few years old.  They make these coins by the truckload in China for souvenir purposes.

[Jay Sin]

Personally,i think its not round and new enough to be a replica coin,maybe it is a real ancient coin. ​