AN ART DECO STYLE SAPPHIRE AND DIAMOND PENDANT/BROOCH of canted oblong form

AN ART DECO STYLE SAPPHIRE AND DIAMOND PENDANT/BROOCH of canted oblong form, centred by an open back collet set oval facet cut sapphire within an open wirework border of numerous small mix cut diamonds, variously set to a plain yellow frame stamped 14K 585