DOYLE & CO. No. 58 DOT (OMN)
• AKA: Ferguson Inverted Thumbprint (Metz 1, p 202); Ferguson Inverted Thumbprint – Faceted Stem (Unitts 1, page 40)
• MAKER: Doyle and Company/Pittsburgh-PA (Company Operated: 1868-1891), Introduced: mid 1880s Introduced
• NOTE: Ref Unitts p40 (top row, right)
NOTE: Large circular optic elements with just 6 full rows of optic.
• MOTIFS: Circles/Balls, Optics, None