The Slim Solid. 0.75mm. For SKX builds. The slim version of our solid caseback — thickness cut from 1.3mm to 0.75mm, which lowers the finished watch's profile on the wrist. Mirror-polished 316L stainless steel, made for SKX cases running Seiko NH movements. The trade-off is stated plainly: the slim back is water pressure tested to 100m, against 200m for the standard solid. For a dress or desk build chasing thinness, that's usually the right trade. Half the thickness.0.75mm of caseback — the low-profile pick. 0.75mm thin.Down from the standard 1.3mm — the difference you feel under a cuff. Mirror-polished 316L.Solid stainless steel, polished to a mirror. 100m rated.Water pressure tested to 100m — the slim trade-off, stated plainly. Fits SKX + NH.All SKX cases running Seiko NH movements — SKX007 and SKX013 families alike. Heads up — fit & install Fits all SKX cases running Seiko NH movements. Note the water-resistance trade-off: 100m on the slim, vs 200m on the standard solid. New to this? Seiko Modding: The Complete Build Guide walks through the whole build. Specs What's Included Fitment How To Mod Specs Quality Swiss Production Quality, ISO 9001 Certified Material 316L Stainless Steel Surface Finish Polished Thickness 0.75mm Water Resistant 100m Fit SKX Cases using NH movement 1x Caseback All photos of watches with modification parts are for illustration purposes only and are not included with the purchase. Fits all SKX cases running Seiko NH movements. Pairs with: Watch Cases Rotors & Bridges Seiko Modding: The Complete Build Guide (2026)
