SKX013 Lumed Sapphire Bezel Insert (Flat) - BGW9 - Black Dual Time

With a double-sided adhesive disc that's included and already fitted to the back of the insert. Peel the backing, line the insert up with your bezel — 12 o'clock to 12 — and press it down firmly for a few seconds. No press-fit, no glue, no tools; it seats the same way Seiko fits its own inserts.

No — SKX007 and SKX013 inserts are different diameters, so they aren't interchangeable. Match the insert to your case: SKX007/SRPD inserts for the SKX007 family, and SKX013 inserts for the SKX013, SKX015, SKX017 and other 7S26-0030 cases. If you're unsure, check the "Fit Models" line in the Specs.

It's the top profile, not the fit. A slope insert angles up toward the crystal for a raised, more three-dimensional look; a flat insert sits level. Both seat on the same OEM (or similar-dimension) bezel — so pick whichever look you prefer; it doesn't change what it fits.

Four lines, each with its own character: scratch-proof ceramic with a deep, glossy finish; lightweight aluminium; solid 316L stainless steel; and lumed sapphire.

Some do — look for a luminous pip at 12 o'clock. Every steel insert has one, and the BGW9 steel and lumed-sapphire lines use a 100% Swiss Super-LumiNova® BGW9 pip (a cool ice-blue glow, up to eight hours on a full charge). Three ceramic Submariner inserts — black, blue and green — carry a lume pip too.

Yes — the insert is the printed ring that sits inside your bezel, so you need a bezel to hold it. It fits the Seiko SKX013 (or SKX007) OEM bezel, or any aftermarket bezel of the same dimension. Replacing both at once? Grab the matching bezel from the "Pairs with" links.

Yes. You can lift an old insert out with a thin, blunt tool — our bezel & insert install guide walks through removal. The adhesive disc is single-use, so once it's off it won't stick again — but you don't need a fresh insert to reseat one: cut a few small pieces of any double-sided adhesive tape, place them on opposite ends of the insert, line it up and press. It holds just fine.

A specific Swiss Super-LumiNova phosphor — appears white-cream in daylight, glows ice-blue at night. The lume Lucius Atelier uses on most dials. Stock Seikos use Lumibrite (green glow); other modding shops often use C3 (green-yellow). BGW9's signature is the cool blue.