AMS8921 Guilloche enamel and diamond pendant by Henry Blank & Co. circa 1910

Paperclip link chain with tapered barrel beads and a central sautoir pendant with diamonds and natural pearls. Beads are elongated and feature opaque white enamel and blue guilloche enamel stripes. Transparent and glossed over an engraved radial pattern. Makers mark for Henry Blank & Co.
Founded as N.E Whiteside in 1890, Henry Blank joined in 1903 becoming Whiteside & Blank and then Henry Blank & Co. Makers mark of a C with an arrow through it was used from the beginning. Henry Blank had travelled to Europe to study and conduct business with watch movement manufacturers, and returned to America on board the Titanic, surviving the sinking in 1912