Assistance with Maker's Mark & Item Identification

[warshard]

Request assistance with identification of both the maker's mark of this item as well as item identification. I have had this item for several years and thus far, have not been able to find any information: the item is made from two cut pieces of coral bezel mounted in a sterling construction. The piece measures 1 3/4 inches long and 1 inch wide. I will appreciate any information forum contributors can provide.
Regards to all--

[dragonflywink]

Not sure that mark has been identified, but bottom should read 'PACHUCA HGO', for the town of Pachuca, Hidalgo, Mexico - it's a keyring, the smaller end screws off.

~Cheryl

[ValkyrieVixen]

I've got the identical piece but the marks are too worn to read. The stones are glass, not Coral, I've seen them in black and green glass too.