Bead-blasted matte surface
Numerals/markings are engraved and filled with paint
Previously named "Matt Black"; material is the same as the black color ceramic, but due to the bead-blasted surface finishing, the color looks more similar to dark grey.
This insert has a slope design.
Hence these crystals are required for a better fit:
Sapphire Flat - Type E - Seiko SKX007
Sapphire Double Dome - Seiko SKX007
Sapphire Double Dome - No Bevel Edge - Seiko SKX007
Seiko SKX007, SKX009 & SKX011 series
Seiko 5 SRPDxx series (SKX007 replacements)