File:Calvert Holt K4 assistant.png: Revision history

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28 May 2013

  • curprev 17:3317:33, 28 May 2013‎ Dnevil talk contribs‎ 108 bytes +108‎ The "K4" on test, Mr. Holt in tender. From "The Model Engineer and Practical Electrician", 20 October 1932.
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