NEW ZEALAND MOUNTED RIFLES

Compare the two loading photos

The recently found glass plate negative found at the Canterbury "The Press" archives - September 2010 - at top.
Below: The photo held by The Alexander Turnbull Library, Wellington, and used in publications since 1920. Obviously both photos were taken within a few seconds of each other, by the same camera and photographer.
Probably the top black and white image held by The Press was taken first as it is noted the horse box being lifted (center top) is lower and closer to the dark coloured hand rail.