This is just a guess but maybe "Stiegel glass". Maybe from Zanesville glass works.
A great deal of Stiegel-type pattern-molded glass, such as the expanded swirled and vertical ribbing and diamond all-over designs, were made in the Midwestern glasshouses at Zanesville , Mantua, and Kent, Ohio, in the Nineteenth Century. Bottles, flasks, compotes, sugar bowls with covers, pitchers, and creamers with these pattern-molded designs, as well as pans and salts, were blown in amber, green, amethyst, and blue. However, while such colored Stiegel glass was flint glass, the Ohio glass is usually of a "soda-lime base. Sugar bowls and creamers with large diamond or oival designs in the Stiegel tradition were made at Zanesville n 'greens and sapphire blue.
The pattern-molded Stiegel-type glass is perhaps the most distinctive. Its beauty is that of line and form and pure color, and nothing is lovelier than some of the expanded-mold patterns in rich blue or amethyst. To appreciate pattern-molded glass one should know something of the process. Glass is pattern-molded by blowing the gather into a mold which has a design cut on its inner surface. After the gather has been impressed with the design, it is withdrawn and shaped by the free-blown technique.