The supposedly authorative large format book titled "Early Hong Kong Transport" by Cheng Po Hung and published by the University of Hong Kong has the above picture on page 36 captioned as being the S.S. Fa Tsan of 1919. However, this vessel is actually a film mock-up used in the 1959 movie "Ferry to Hong Kong". I have just watched the DVD. The quality of the colour image should have given the game away to the picture compiler. The paddle wheel housings are definately fakes added to an existing vessel for the film.
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The University of Hong Kong
The University of Hong Kong Museum Society have also erroneously used the same image as being a 1900s historical shot:
http://www.hkums.com/document/newsletter/May2009_newsletter_newId.pdf
Ferry to Hong Kong
Repeated use of this image by the HKU demonstrates how myths and legends get started