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Vintage Pyrex 14D Green Glass Lens – 1950s–70s USA Railroad Signal / I - $40 (Colorado Springs)
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This large, domed glass lens was manufactured by Corning Glass Works, known worldwide for producing high-quality borosilicate glass under the Pyrex brand. It was originally designed for industrial and signal use, such as railroad, aviation, or traffic control lighting.
📜 HISTORY & MANUFACTURING BACKGROUND
The “14D” model code identifies this piece as a 14-inch convex (domed) green lens — the “D” denoting the domed profile used to enhance long-distance visibility when illuminated from behind.
The “MADE IN U.S.A.” marking and block-letter Pyrex logo style date this particular example to the mid-20th century (circa 1950s–1970s), a period when Corning was supplying much of the nation’s industrial and transportation infrastructure.
Today, these lenses are prized for their craftsmanship, vivid color, and versatility — often repurposed as decorative art glass, photography props, or display pieces.
📏 SPECIFICATIONS
Manufacturer Corning Glass Works (Pyrex Division)
Model Marking 14D
Material Borosilicate Pyrex glass
Color Deep emerald green
Shape Convex (domed)
Diameter Approx. 14 inches
Thickness ~1 inch at center
Country of Origin United States
Era of Manufacture 1950s–1970s
Condition Excellent vintage condition. Minor surface wear and a few light marks consistent with age. No cracks or major chips. Displays beautifully in sunlight or backlighting. See photos for exact condition.