Submariner PCG 5512 — Pointed Crown Guards · Gilt Chapter Ring, Four Line

Four-line 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. chapter-ringChapter ringA circular scale around the dial marking divisions of time. On vintage watches, the presence or absence of a ring around the minute track can distinguish dial types. dial; roughly one in five chapter-ring dials by the author’s estimate.