A/S Tryvandsbanen was a Norwegian company that constructed a rail extension nicknamed Tryvandsbanen ("Tryvann Line") of the Holmenkoll Line from Besserud (then Holmenkollen) to Tryvandshøiden station.
[1] The company was established 4 January 1912 and opened the Tryvann Line 15 May 1916.
[2] Tryvandsbanen was disestablished on 1 January 1920.
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