BLOCK (AKA) jef
• AKA: None
• MAKER: Jefferson Glass Company/Steubenville-Ohio/Follansbee-WV (Operated: 1900-1930), Introduced: c1902 Introduced

• Bowls including rare cobalt opalescent. Also found with frit decoration.
Reference: Heacock/Elmore. Opalescent Glass from A to Z page 32
• MOTIFS: Bands/Rings, Squares/Rectangles