An Art Deco sugar-loaf ruby and diamond ring by Janesich, Burma, no heat

An Art Deco sugar-loaf ruby and diamond ring by Janesich, the ruby weighs 12.30cts and is set in platinum with circular-cut shoulder and a chevron of calibré-cut rubies to the shoulders in platinum, French control marks and signed, size J

Accompanied by report from Gübelin dated September 2021 stating that the cabochon ruby weighs 12.30cts and is a natural ruby with no indications of heat treatment. Origin: Burma (Myanmar).