IWC 18k yellow gold ladies wristwatch

IWC 18k yellow gold ladies wristwatch with neutral 14k yellow gold bracelet, Switzerland around 1955/1975, manual winding, snap on case back, case with 4 diamonds set, milanaise bracelet with deployant clasp, silvered dial, gilded indices & hands, nickel plated movement calibre 431 with fausses cotes decoration, 18 jewels, length approx. 17 cm, width approx. 16 mm, weight approx. 38g, condition 3, from the estate of a collector