Are all 11 series subs "superlative chronometers"?

[cascadez71]

As in the Rolex +2/-2 (or +3/-1)? Did all 11 series come with the green tags that indicate this as well as written on dial?

Or did any of the 11 series ship as COSC certified only (+6/-4)?

Is there any actual difference at this stage (10+ years) after manufacture? Presumably any of these 3130/3135s going in for RSC service would come out identical, correct?

[omar-rye]

The COSC certification was defined as -4 to +6 seconds per day prior to 2015, while the Superlative Chronometer with the new standard has been guaranteed at -2 to +2 seconds per day since then. The term “Superlative Chronometer” did not carry the same meaning before 2015 as it does after. I assume the RSC will regulate it to that standard before returning it. Obviously, you can’t expect a vintage or neo vintage watch to return with -2 to +2 accuracy, but that doesn’t mean it can’t happen.

[cascadez71]

Originally Posted by omar-rye

The COSC certification was defined as -4 to +6 seconds per day prior to 2015, while the Superlative Chronometer with the new standard has been guaranteed at -2 to +2 seconds per day since then. The term “Superlative Chronometer” did not carry the same meaning before 2015 as it does after. I assume the RSC will regulate it to that standard before returning it. Obviously, you can’t expect a vintage or neo vintage watch to return with -2 to +2 accuracy, but that doesn’t mean it can’t happen.

Thank you for the clear and concise answer!

[Tools]

Originally Posted by cascadez71

Thank you for the clear and concise answer!

Not really.

COSC is still -4/+6, it has not changed. It is a Swiss test facility, independent from Rolex, that conducts these tests in order to put "chronometer" on the dial of a Swiss watch by Swiss law. These are test parameters that the watch must meet during the tests.

Rolex has stated that they now regulate to -2/+2 and that is what their "superlative" means. They rolled out the green tag at the same time they made this marketing announcement and their in-house regulating criteria known.

[omar-rye]

Originally Posted by Tools

Not really.

COSC is still -4/+6, it has not changed. It is a Swiss test facility, independent from Rolex, that conducts these tests in order to put "chronometer" on the dial of a Swiss watch by Swiss law. These are test parameters that the watch must meet during the tests.

Rolex has stated that they now regulate to -2/+2 and that is what their "superlative" means. They rolled out the green tag at the same time they made this marketing announcement and their in-house regulating criteria known.

Here’s a refinement to my wording. Thank you for the clarification:

The COSC certification (which has always been defined as -4 to +6 seconds per day) was in place prior to 2015, while the Superlative Chronometer with the new standard has been guaranteed at -2 to +2 seconds per day since then. The term “Superlative Chronometer” did not carry the same meaning before 2015 as it does after. I assume the RSC will regulate it to that standard before returning it. Obviously, you can’t expect a vintage or neo vintage watch to return with -2 to +2 accuracy, but that doesn’t mean it can’t happen.