Fishel Nessler Art Nouveau Brooch Necklace

The Art Nouveau brooch with floral designs mounted as a pendant on this necklace is signed by Fishel Nessler. The semi-precious stones are green kyanite flat ovals and the clasp with a floral design to match the brooch is made of sterling silver.
Carl Fishel and Louis Nessler founded their first company about 1885-1886 on Fifth Avenue in New York. They often produced silver plated jewelry with a brass tone finish and used a lot of floral designs. They deposited their first patent in 1893. Around 1898 Louis Nessler retired and Theodore Fishel became a partner. In 1910 Fishel, Nessler & Co went bankrupt. In 1911 Theodore started Fishel, Nessler Co (without the &). So it is sometimes a bit difficult to distinguish the trademarks and date the pieces. It "appears" that items with the & in the trademark are before 1910 and without after. The company stayed in business until 1937.
The Art Nouveau brooch in this necklace is signed F.N CO with the crown above and trade mark written under, so according to my research it appears to be one of the early pieces made by Theodore's company around 1911.