The 1972 tube stock was a minor evolution of the 1967 stock that was ordered for the Victoria line. The first batch (MkI) were for the Northern Line to replace 1938 stock. The second batch (MKII), while intended for the new Fleet (now Jubilee) line (...) (17 years ago, 23-Aug-07, to lugnet.trains, lugnet.loc.uk, lugnet.underground, FTX)
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