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Old 25 August 2022, 06:15 AM   #2799
Omarion07
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Join Date: Mar 2021
Location: Ireland
Posts: 377
Quote:
Originally Posted by saxo3 View Post
Omarion, what you say is NOT correct.
Here is the relevant paragraph from the link you quote:

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THE SUPERLATIVE CHRONOMETER CERTIFICATION

For each Rolex watch, the Superlative Chronometer certification comprises checks to guarantee the key areas of performance that may be disrupted during the course of the manufacturing process – precision, power reserve, waterproofness and self-winding.

All tests are conducted after the movement has been cased, to be as faithful as possible to the conditions under which the watch will be worn by its owner. Exclusive testing methodologies are employed, making use of entirely automated high-technology equipment developed by Rolex. Each movement is submitted to COSC (the Swiss Official Chronometer Testing Institute) for its official certification, after 15 days and 15 nights of testing involving seven eliminating criteria in five static positions and at three temperatures. All Rolex movements obtain this official Swiss chronometer certificate.

• PRECISION
After casing the movement (an operation which can affect precision by several seconds per day), Rolex tests the precision of each watch over a 24-hour cycle, in seven static positions as well as in a rotating rack, according to an exclusive methodology that simulates real-life wear. The tolerance criteria are much stricter than for the official certification with regard to the average rate deviation, the daily precision as perceived by the wearer. The deviation for a Rolex Superlative Chronometer must not exceed −2/+2 seconds per day, after casing, versus −4/+6 seconds per day required by COSC for the movement alone.
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Rolex does not REGULATE but measure the PRECISION in 7 static positions. That is completely different.

I do not know what the quoted 7th position could be.

Why would Rolex test in only one additional position, i.e., one intermediate angle between the known positions / angles for DU, DD, 9U, 6U, 3U?

Is the "seven" in the text a simple Rolex typo error undiscovered since March 2017?

I wrote that the 32xx movements are REGULATED in 5 positions, which is correct.

One can verify and see it on the 32xx engravings 5 POS. + TEMP.


Rolex caliber 3235


Rolex caliber 3255

Ah ok.. I assumed they were the same. Thanks for the explanation Saxo3. But why would test precision in “7” positions when they regulate in 5 only as shown on the movement? And I doubt it’s a typo tbh


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