Build your own custom automatic watch with this 40mm stainless steel watch case, engineered for popular Seiko NH35, NH36, NH38 and 7S26 movements. The IP Gun finish pairs a brushed bezel and case with polished accents for a modern, understated look that suits both everyday wear and project builds.
Machined from 316L stainless steel and topped with a flat sapphire crystal, this case is a solid foundation for a durable, water resistant custom timepiece. The set arrives with the bracelet, crown, gasket and spring bars, so you have the core components ready to assemble around your chosen dial and hands.
Ideal for watch modders, hobbyists and small workshops assembling custom automatic watches. This case is designed around Seiko NH35, NH36, NH38 and 7S26 movements and accepts 28.5mm dials, making it a practical choice for SKX007 style projects and personal builds.
To fit NH70, NH71 or NH72 movements, a dial holding spacer (part 4408172) is required for assembly. The caseback and chapter ring are not included, so choose compatible parts to complete your build.