Art Déco brooch with 2 fine sapphires and diamond roses

Art Déco brooch with 2 fine oval faceted sapphires totalling ca. 2.5 ct, blue sapphire without signs of heating, 14K yellow gold, face side platinum, needle of 18K rose gold, 6.3 g, safety brooch accessoire from later times, silver, fixed in hook with tin-solder, 6.4x0.5 cm, around 1930, minor signs of wear, in an antique small box (jeweller Pfister, Stuttgart).