I found a link to Tiffany & Company hallmarks here. You can see if yours would match any of those listed. Sometimes age will wear away part of the hallmark but you might find a possible match.
Rating
Antique Stick Pins by: Anonymous
Thats interesting, maybe these identical stick pins were originally joined together with a safety chain to resemble the very early stick pins. The first stickpins were simple and consisted of clusters of stones or single stones or plain gold; sometimes two were worn linked together by a chain.
Rating
Tiffany & Co., Hallmarks by: Yvonne Hammouda-Eyre
Hi Art, without the benefit of a photo, the Tiffany maker's mark that comes closest to resembling the figure 8 sideways would be John C Moore's mark -1853. If the pins are a matching set, this could be why one of the pins only is stamped Tiffany & Co. best regards Yvonne Hammouda-Eyre ANTIQUE JEWELRY INVESTOR
