[Complete 31-Blueprint Portfolio] Victoria Line Route Plans 1965 (Amended to 1968): Scale 88ft to 1in From Victoria to Walthamstow

Complete Official Engineering Blueprint Portfolio. Oblong Folio (Folder: 350 x 240 mm; Plans unfold to 850 x 350 mm). Title page, followed by a complete sequence of 31 large, fold-out Diazo print (whiteprint) engineering schematics numbered N.9619/1 to N.9619/31. Housed in the original publisher's brown soft-cover folder. Binding remains structurally sound and intact, holding all 31 fold-out plans securely. The Diazo prints and text pages are in very good, clean condition throughout, exhibiting a little age-toning to the plans. An exceptional, clean, and remarkably complete architectural survival.The Victoria Line stands as one of the greatest feats of mid-twentieth-century British civil engineering, representing the first completely new subterranean tube line built across central London in over fifty years. Although a high-speed line linking the north-east to the south-west was originally proposed in 1948, parliamentary approval and funding stalls delayed the final go-ahead until 1962, with construction taking place throughout the 1960s.This ultra-scarce internal portfolio provides a massive, highly detailed 88-feet-to-1-inch surveyor's view of the line, matching the underground paths precisely against the surface street architecture above. This specific issue features vital engineering updates and amendments running up to 1968, capturing the definitive "as-built" configuration of the tunnels just as the line prepared to open its first stages between 1968 and 1972. Complete sequences of these large internal LTB whiteprints are vanishingly rare on the open market, highly prized by historians of London topography, civil engineering, and mid-century industrial design.…