I am hoping someone can assist me... I own a sterling silver mustard pot, marked Sheffield 1975. There is a maker's mark of what looks to be 'RGD' or RGB' with each letter in an interlocking circle in the shape of a clover (with R being in the top circle).
I have not seen this makers mark before and cannot find any such mark anywhere in any reference books! After several days of trying to find it, I have had to concede defeat.
If anyone has any clues what maker it may be, it would be greatly appreciated!