The H Stock classification has been used twice for London Underground stock.

[1] The first time was the designation given to examples of B stock that were rebuilt in the 1920s.

The second time that stock was classified H Stock (H standing for Handworked doors) was in the late 1940s.

The surviving examples of C stock, D stock, and E stock were reclassified and the last of these cars remained in use until 1958.

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