I have a large grape vine patterned platter but although I believe this to be Elkington & Co I am struggling with the third mark. Unfortunately they are that tiny they are hard to see but the first is a gothic something or other, the second E&Co under a crown in a shield and the third is a diamond shape with and O but here is the weird bit there is a cross in the middle of the O. Can anyone help with the last mark please? Is it the date letter O or something else.
![Image](https://www.925-1000.com/pics/Ximg.jpg)
![Image](https://www.925-1000.com/pics/Ximg.jpg)
Many thanks in advance