DOYLE & CO. No. 250 (OMN)
• AKA: Block
• Doyle and Company (Pittsburgh-PA, Company Operated: 1855-1891), Introduced: c1891 Introduced
• NOTE: Sid Lethbridge 2019: "can... be documented to around 1891 based on late Doyle catalogues and price lists and early US Glass catalogues but could have been earlier, definitely no later than 1891."
• Motifs: (Hexagon, Large)