An emerald and diamond-set gold flower head brooch by Van Cleef & Arpels

An emerald and diamond-set gold flower head brooch by Van Cleef & Arpels, c.1955, centred with a cabochon emerald, the six petals pavé-set with round brilliant-cut diamonds and with fringe border, further diamonds to the stem, one diamond missing, signed Van Cleef & Arpels, inventory number 16297, French control marks, 6.5cm high, with blue suede Van Cleef & Arpels pouch