I desperately need help in identifying this glass Bowl. It has been made more tantalisingly difficult than usual by the etched details on the base. (H680/165) This has not helped me!! The item measures 9.5cm in height and with a rim diameter of 15.8cms. I would describe the rim as folded. I could have got this wrong. It has extensive random bubbles encased- in a light pewter/ grey glass very much in the Biot style. In this case no makers name. Anyone with ideas??