RIVERSIDE GLASS WORKS No. .73 (OMN) stem
• AKA: Inverted Thumbprint and Star (Type 3)
• Riverside Glass Works (Wellsburg-WV, Company Operated: 1880-1899), Introduced: c1887 Introduced
• NOTE: Original Manufacturer's Name/Number (OMN) Possibly No. 73 Optic Star
• Motifs: (Stars/Rosettes), (Circles/Balls), (Optics)