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Regal
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Neither the minute or the second hand progresses in a constant sweep in a mechanical watch (as compared to a spring drive).
The Smiths is a 28,800 bph watch, meaning the second hand ticks 8 times per second, and progresses 0.75 degress per tick.
I'm not sure if this is correct, but does the minute hand progress at the same degrees as the second hand in an automatic watch? If so, it would progress at 8 ticks per minute, 0.75 degrees per tick, at an interval of once every 7.5 seconds. So in the photo of the Smiths watch, the minute hand wouldn't have progressed at all over a five second interval.
Or is this completely wrong?