Explorer 6610

Second-generation Explorer with the slimmer cal. 1030, allowing a flatter caseback than the bubbleback A296 references. Dials still read “Officially Certified ChronometerChronometerA watch or movement certified for timekeeping precision under a defined testing standard. The applicable certification depends on its maker and period; it is not the same as a chronograph.” and carry radiumRadiumA radioactive element historically used in luminous paint on watch dials and hands. Its use belongs to the history of luminous materials, rather than a particular dial colour. lume, giltGilt dialIn classic vintage Rolex usage, a dial whose gold-coloured text or markings reveal the metal beneath the dark surface coating. Gold-coloured printing alone does not establish this construction. print and a chapter ring.