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    At Bob's Watches, your trust is very important to us. We believe that buying a pre-owned Rolex watch online should be simple, honest, and straightforward. To that end, we guarantee that every Rolex watch on our site is 100% authentic, comprised entirely of Rolex parts. Our mission is to be the leading trusted online source for selling and buying authentic pre-owned Rolex watches. We stand behind this authenticity guarantee with a full money back refund on any watch not found to be completely genuine.

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100% Certified Authentic

Bob's Watches
100% Certified Authentic

At Bob's Watches, your trust is very important to us. We believe that buying a pre-owned Rolex watch online should be simple, honest, and straightforward. To that end, we guarantee that every Rolex watch on our site is 100% authentic, comprised entirely of Rolex parts. Our mission is to be the leading trusted online source for selling and buying authentic pre-owned Rolex watches. We stand behind this authenticity guarantee with a full money back refund on any watch not found to be completely genuine.

BOB’S WATCHES

ROLEX BLOG

Is Your Rolex Running Fast or Slow?

February 4, 2015

BY Paul Altieri

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rolex watches - Bob's Watches

Watch Movement - Bob's Watches

Watch Movement

Though Rolex is known for excellent precision in their timepieces, every mechanical watch will, at some point, slow down or even speed up. Mechanical watches, like those made by Rolex, are regulated by a hair spring. Rolex uses a precision engineered Parachrom hairspring. Their watch movements are also COSC certified which means that the timepiece will deviate no more than -4 to +6 seconds a day.

There are several reasons why your watch might be running fast or slow. The variation in speed is greatly influenced by the amount of activity your watch endures. If you wear your watch on an active day, it is likely to vary from a day when your watch saw little movement, such as sitting on your dresser. Temperature, whether it be too hot or too cold, can also influence a watch’s precision.

One of the biggest impacts on your Rolex’s reliability is how often it is serviced. If your watch is running slow, it could be because it needs a good cleaning. When you have your Rolex serviced, the certified technician will take it apart, clean it, regulate it to ensure its precision, and then put it back together. It is suggested that you have your watch regulated every 2 to 7 years, or when it begins running slow.

rolex watches - Bob's Watches

Rolex Watches

If you notice that your watch is running fast, it is likely that the balance spring became magnetized. Powerful magnets can be found in a number of places, such as in some stereos and laptops. When a balance spring becomes magnetized, its coils stick together which shortens the balance spring and speeds up the watch. Though this sounds bad, it is an easy fix for a reputable watch service department. Rolex also attempts to lessen this risk by developing hairsprings that are very difficult to magnetize.

Crown Vintage Datejust 1500 - Bob's Watches

Crown Vintage Datejust 1500

Aside from getting your watch repaired or serviced, there are a few tricks you can try to regulate your watch on your own. Gravity has a big impact on a watch’s precision. If your watch is speeding up, lay the watch vertically with the winding button facing down. If your watch is slowing down, lay it flat with the dial pointing up. The way the watch is positioned will allow it to use gravity to adjust the friction on the balance staff. Though these simple tricks will not precisely regulate your Rolex, they may help you tweak the watch’s precision enough to serve you until you can get it properly serviced.

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4 Responses to “Is Your Rolex Running Fast or Slow?”

  1. Valuation says:

    I’m thinking of changing my Rolex president just date my father purchased it from America about 6 years ago and paid around £4000 for it Comes with nice wood Vanir box and all papers I’d just like to see what it’s value is regards Jason

  2. lee r says:

    hi Paul,
    I recently purchased a Tudor Black Bay Black from Bob’s Watches and continue to love it and plan to add to my collection in the future. i purchased a circa 1987 day/date about a year ago. The watch is beautiful in yellow gold but it’s run about 10 or 11 seconds slow per day since i’ve gotten it. Do you think it needs to be serviced or do you think that’s not that bad and i should wait until it gets worse?

    • Paul Altieri says:

      COSC tolerances permit anywhere between -4 and +6 seconds of timekeeping variance per day (compared to the -2/+2 seconds promised by Rolex’s new in-house chronometer-certification standards). Although your watch is running slightly outside of its specs, it is not all that far off, so it may just need to be regulated, rather than requiring a full-on service.

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    Bob's Watches is an independent watch dealer and is not sponsored by, associated with and/or affiliated with Rolex, or any other brand listed. Bob's Watches only sells pre-owned watches and provides its own warranties on the watches it sells. Rolex Datejust, Rolex Day Date President, Submariner, Presidential, Explorer, Sea Dweller, Super President, GMT Master, GMT, YachtMaster, Prince, Milgauss, MasterPiece, Air King, Cosmograph Daytona, and PearlMaster, etc are all registered trademarks of the Rolex Corporation. All brands including Brequet, Cartier, Audemars Piguet, Patek Philippe, Ulysse Nardin, Breitling and Omega, etc are trademarks of their respective owners.