Generations · Rolex

Rolex GMT-Master II: dimensions by generation

Every Rolex GMT-Master II reference in Horlobase with a thickness or a lug-to-lug, grouped by reference series, with its production years and its case figures.

Reference	Years	Case diameter	Case thickness	Lug-to-lug	Case material
116xxx references (2005–2019)
116718LN	2005–2018	40 mm	11.8 mm	47.5 mm	18 ct yellow gold
116713LN	2006–2018	40 mm	11.8 mm	47.5 mm	Steel and yellow gold
116710BLNR	2013–2019	40 mm	11.8 mm	47.5 mm	Oystersteel
116719BLRO	2014–2018	40 mm	11.8 mm	47.5 mm	18 ct white gold
126xxx references (2018–)
126710BLRO	2018–	40 mm	12.2 mm	48 mm	Oystersteel
126711CHNR	2018–	40 mm	12.2 mm	48 mm	Steel and rose gold
126715CHNR	2018–	40 mm	12.2 mm	48 mm	18 ct rose gold
126710BLNR	2019–	40 mm	12.2 mm	48 mm	Oystersteel
126719BLRO	2019–	40 mm	12.2 mm	48 mm	18 ct white gold
126713GRNR	2023–	40 mm	12.2 mm	48 mm	Steel and yellow gold
126718GRNR	2023–	40 mm	12.2 mm	48 mm	18 ct yellow gold
126729VTNR	2025–	40 mm	12 mm	47.6 mm	18 ct white gold

Figures and their sources are on each reference’s page. Production years: The Watch Guys, approximate (Rolex does not publish them).