DOYLE & CO. No. 21 DOT (OMN) stem
• AKA: Bennington Inverted Thumbprint (Metz 21, Page 20)
• MAKER: Doyle and Company/Pittsburgh-PA (Company Operated: 1868-1891), Introduced: mid 1880s Introduced
• NOTE:
• MOTIFS: Hexagon, Large, Honeycomb, Optics