Birmingham marks, marcasite?

[elenasdisc]

Hi, have a beautiful pin but based on the marks it's from 1880 and I don't know if that's possible.

http://www.elenasdiscoveries.com/eBay/marc.jpg

[trevorg]

Hi,
This looks to be marked for Birmingham 1955-56 and the maker Nathan Brothers.
Regards,
Trevor

[elenasdisc]

Thank you Trevor...appreciate the information...how did you arrive at that date?

[elenasdisc]

Thanks again Trevor...just did a little more research and found the hallmark for 1955 in a seperate internet site.