1957 Sovereign Gold Coin - Help

Hi All,
Could you guys, experts in gold coins, tell me if this coin is real or fake?
I research in the internet but couldn't find any Georgivs V Sovereign for the 1957 mint date. Only found 1957 Elizabeth Sovereign.
Thanks in advance.
Photos are from the seller.

 

Log in or Sign up to hide this ad.

They only made George V sovereigns from 1911-1932.

 

Thank you @Chris B, I was thinking this coins could be a counterfeit and your information confirms that, so I won't purchase that coin.