When I was getting my Daytona (white) I decided on the Rolex movement over the Zenith mainly due to three reasons: 1). the Zenith does not have seconds hacking (where the seconds hand stops when you pull out the crown), thus making it very hard to accurately set the time, 2). the Rolex has two days power reserve vs. three days power reserve for the Rolex movement, and 3) the Rolex movement has the much better easylink expansion bracelet.
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