FERGUSON INVERTED THUMBPRINT (AKA)
• AKA: Ferguson Inverted Thumbprint (Millard 1, Plate 170)
• Unknown Maker (Unknown Location, Operated: Unknown), Introduced: mid 1880s Introduced
• NOTE: Ref Unitts p40 (top row, left)
NOTE: Has small honeycomb optic elements with 8 full rows of optic.
• Motifs: (Honeycomb), (Optics)