Mark identification help

I found this adorable little box, which I have been cleaning up all week, but I have been having problems identifying the marks. Can you help?

I have a Marrow Spoon with the following marks on it - J inside a circle, G inside a circle, What looks like a rose inside a squashed circle, then what looks like an old fashioned D which has an extra line through the D. EP in a rectangle.

Sorry the picture isn’t great but best I could manage.

Any help on who, where and when would be very helpful.

An idea of value too. I am interested in selling this item.