Reference:118238: Difference between revisions

Line 126:

* KIF Elastor shock absorbers

* Nivarox hairspring on early production; Parachrom Blu hairspring on late production (rolled out from 2005)

* COSC chronometer certified (pre-2015 ~~standard:~~ ±4 / +6 seconds per day; ~~not~~ the ~~post-2015~~ Superlative Chronometer ±2)

* COSC chronometer certified — pre-2015 examples at ±4 / +6 seconds per day; examples cased from 2015 onward carry the tighter Superlative Chronometer ±2, the same catalogue-wide caliber 3155 upgrade mid-run

~~The 118238 is the last Day~~-~~Date generation~~ to ~~ship without~~ the Superlative Chronometer ~~2015 re-certification. The 128238 successor and the broader post-2015 Rolex catalogue carries the tighter~~ ±2-seconds-per-day ~~spec;~~ 118238 examples ~~remain at~~ the older COSC ±4 / +6 ~~standard~~.

Rolex re-regulated caliber 3155 catalogue-wide to the tighter Superlative Chronometer ±2-seconds-per-day standard in 2015, mid-way through the 118238's own production run, which continued to 2019. Early 118238 examples carry the older COSC ±4 / +6 certification; examples cased from 2015 onward should carry the tighter ±2 spec, the same movement upgrade the 128238 successor inherited at launch.

Service: Rolex Service Centre runs USD 800 to 1,200 for full service; independent watchmakers run USD 400 to 700. Service intervals are 10 years officially, 5 to 7 years per independent practice.

@@ Line 126: / Line 126: @@
 * KIF Elastor shock absorbers
 * Nivarox hairspring on early production; Parachrom Blu hairspring on late production (rolled out from 2005)
-* COSC chronometer certified (pre-2015 standard: ±4 / +6 seconds per day; not the post-2015 Superlative Chronometer ±2)
+* COSC chronometer certified — pre-2015 examples at ±4 / +6 seconds per day; examples cased from 2015 onward carry the tighter Superlative Chronometer ±2, the same catalogue-wide caliber 3155 upgrade mid-run
-The 118238 is the last Day-Date generation to ship without the Superlative Chronometer 2015 re-certification. The 128238 successor and the broader post-2015 Rolex catalogue carries the tighter ±2-seconds-per-day spec; 118238 examples remain at the older COSC ±4 / +6 standard.
+Rolex re-regulated caliber 3155 catalogue-wide to the tighter Superlative Chronometer ±2-seconds-per-day standard in 2015, mid-way through the 118238's own production run, which continued to 2019. Early 118238 examples carry the older COSC ±4 / +6 certification; examples cased from 2015 onward should carry the tighter ±2 spec, the same movement upgrade the 128238 successor inherited at launch.
 Service: Rolex Service Centre runs USD 800 to 1,200 for full service; independent watchmakers run USD 400 to 700. Service intervals are 10 years officially, 5 to 7 years per independent practice.