Rolex Chronergy Family

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BRANDS: Rolex

Production: 2015 – Current
1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s	2020s

Rolex introduced the Chronergy family in 2015 with Cal. 3255, an updated movement for the famous Day-Date (President) model. It is a major redesign, with Rolex claiming that over 90% of the components are redesigned or all-new. The marquee feature for consumers is the “3-day” (70 hour) power reserve, which is made possible by the “Chronergy escapement” with optimized gears and lubricants as well as a longer mainspring inside a thinner barrel. Other notable features include more efficient automatic winding, unrestricted calendar correction, and “backward” (counter-clockwise) time setting.

This movement is described by Rolex as a “Superlative Chronometer.” The company uses this term to indicate their most accurate modern movements. They claim that these are twice as accurate as any official chronometer certification, to -2/+2 seconds per day “after casing.” The Superlative Chronometer test is performed in-house and goes beyond COSC procedures.

	3000 Family	3100 Family	Parachrom Family	Chronergy Family
	1977-2001	1988-2010	2005-present	2015-present
Time Only	3000	3130	3130 3132
Milgauss			3131
Datejust	3035	3135	3135 3136	3235
Day-Date	3055	3155	3155 3156	3255
GMT	3075	3175	3187
GMT II	3085	3185	3186	3285

Calibre	Start Year	End Year	Diameter (mm)	Diameter (ligne)	Complications
Rolex 3235	2015	Current	28.50		Date, Hacking Seconds, Hand Winding, Quick Date Correction
Rolex 3255	2015	Current	28.50	12.5	Date, Day, Hacking Seconds, Hand Winding, Outer Day Wheel, Quick Date Correction, Quick Day Correction
Rolex 3285	2018	Current	28.50	12.5	24 Hour Hand, Date, GMT Hand, Hacking Seconds, Hand Winding, Independently-Adjustable 24 Hour Hand, Quick Date Correction

Rolex 3235

Rolex 3255

Rolex 3285