Art Deco oval cross hatch shield ring set with diamonds and sapphires

Art Deco oval cross hatch shield ring set with diamonds and sapphires. Centred with a round Old European cut diamond in a grain setting, bordered by twenty seven rectangular baguette cut sapphires in four linear row channel settings and interspersed with twenty four round old cut diamonds in grain settings, to an elongated oval cluster design featuring fine grain settings, subtle millegrain borders and pierced open scalloped gallery, met to either side with raised shoulders which flow to a solid shank. Estimated total diamond weight 0.70cts. Estimated total sapphire weight 0.50cts. Indistinct marker's mark.