Bar pin with 3 old cut diamonds

Needle with 3 old-european-cut and ca. 50 rose-cut diamonds totalling ca. 0.7 ct, several with nicks/chips, 14K yellow gold, face side platinum, 5.3 g, L: 7.3 cm, around 1915, good condition, some patina, fine ajour- and millegriffes craftsmanship.