1920s Old European cut diamond solitaire in platinum

1920s Old European cut diamond solitaire in platinum. Centrally set with a 1.00ct round Old European cut diamond, H-I colour, SI clarity in a four claw setting, flanked by rectangular baguette cut and round old cut diamonds in millegrain and grain settings, to a solitaire design with stylised settings and an intricately pierced Greek key gallery, decorated to either side with diamond set shoulders which terminate to engraved foliate embellishments that smooth to a slim shank.