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Rolex

Four markings is all the trick:

 

First mark shall be this: I the space inbetween to tge next mark: I is also a "mark" and the actual First mark, then comes the second mark: I which is actually the second mark to read (!), then the comming space is the third mark, and so on ... .
Example: the central hand stops after two marks: I I inbetween the third mark: I , then the central second hand is displaying 3/8 th of a second.
This can only work if scaling has four marks: I .
The central second hand makes 8 littel steps in a second, die to the beat ratio.

Rolex and others pay far to much attribute to a classic look of a chrono with five marks as this was right for movements with 18.000 beats per tour ( such a hand makes only five little steps per second).

The current Daytona scaling would be correct if Rolex would use a high beating 36.0000 beats per hour movement (like in the Zenith versions) nur the current Daytona movement is beating at 28.800 beats per hour, if I am not completely wrong.

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