A mid-20th century diamond ribbon bow brooch

A mid-20th century diamond ribbon bow brooch, the stylised ribbon bow pavé set throughout with graduated round brilliant diamonds, with a centre channel line of baguette cut diamonds, mounted in unmarked white metal, with honeycomb backholing to verso. Brooch fittings with pin and roller catch. Estimated total diamond weight approximately 4.00ct. 12.76g Provenance: Maurice 'Dick' Turpin, Barons Keep, London W14. Condition Report: Diamonds well matched, bright and lively. One of the baguette cut diamonds has a chip to one egde and it's not sitting flush in the setting. Various marks to mount.