1950s antique R.F.&P. R.R. TRACK & SIGNAL diazo PLANS Potomac Yard 11pgs
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This listing description was prepared with the assistance of AI-based research tools. While care has been taken to ensure accuracy, details should be reviewed carefully and independently verified where important.
Original Richmond, Fredericksburg & Potomac Railroad (R.F.&P. R.R.) diazo track and signal plan booklet, consisting of whiteprint / blue-line engineering drawings used by the railroad’s Signals & Communications Department.
These are original diazo engineering prints, not blueprints and not reproductions. Diazo prints were the standard working-format for railroad signal and track plans from the 1930s–1960s, favored for their speed of production and ease of revision. The cream-colored paper with dark line work seen here is characteristic of the diazo process.
Interior sheets document interlockings, switch boxes, and signal layouts, with a strong focus on Potomac Yard, Virginia, including NAX Interlocking and related control points. Plans show running tracks, signal tracks, electrified track, circuit controllers, lamps, indicators, and control cases, with legends, ICC numbers, approval signatures, and revision blocks present throughout. Several sheets note remote control from AF or RO Tower.
Physical details
Condition
Significant damage to cover and first page, including edge loss and tearing
Additional edge wear and handling damage to remaining sheets, primarily at margins
Interior drawings remain clear, legible, and technically readable
Spine area shows separation consistent with long-term engineering shop use
Overall condition reflects authentic field and office railroad material, not archival data-start=\"2470\" data-end=\"2785\">Potomac Yard was one of the most important classification yards on the East Coast, and original R.F.&P. diazo signal plans are notably scarcer than material from larger systems such as PRR or NYC. Complete grouped booklets are uncommon, as most surviving examples are loose sheets or institutional holdings.
Ideal for:
Railroad historians and signal specialists
Transportation museums and archives
Industrial and engineering ephemera collectors
Reference, research, or framed display use
Authentic period piece related to family, historyor local heritage - well-suited for historical collections, genealogical /genealogy research, or museum acquisition.Vintage or Antique.
CONDITION: Page wear as shown and in description. See listing description and photos.
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LOC:
LOC2: 07A-TMKTK-F250828BTA200G
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