【Custom 42mm Stainless Steel Case for Seiko SNPO55J1 – 7D48 Kinetic Movement Mod Case】 – Precision-crafted replacement watch case (改装精钢表壳) designed for the Seiko Sportura SNPO55J1/SNP055J1 series-. The factory case measures 42mm in diameter and 12mm in thickness-11 – this custom case is engineered to match those exact specifications. Crafted from solid stainless steel, it offers a direct replacement for the original case while accommodating the unique 7D48 Kinetic (人动电能) movement-. Unlike mainstream Seiko mod cases designed for NH35/NH36 movements-, this case is purpose-built for the Sportura platform-. The essential foundation for restoring or customizing your SNPO55J1 – bringing new life to this distinctive timepiece-.
Precision Fit for Sportura SNPO55J1/SNP055J1 – Specifically engineered for the Seiko Sportura series with 42mm case diameter and 12mm thickness-11. The factory case features a special anti-wear carbon film-treated stainless steel bezel- – this custom case maintains compatibility with that design language while offering a fresh start for your mod project.
7D48 Kinetic Movement Compatibility – Designed to accommodate the 7D48 Kinetic (人动电能) movement- found in the SNPO55J1/SNP055J1. This is a critical distinction – the 7D48 movement has different movement ring and crown stem specifications compared to the NH35/NH36 movements commonly used in Seiko mods-. Not compatible with NH35/NH36 movements – please confirm your movement type before ordering.
Solid Stainless Steel Construction – Crafted from high-quality stainless steel- with a durable finish that matches the original Sportura aesthetic. Available in custom finishes to match your vision – polished, brushed, or PVD-coated options available upon request.
Essential for Restoration & Customization – Perfect for: Replacing a worn or damaged original case – restore your SNPO55J1 to like-new condition; Custom mod builds – the essential foundation for a unique Sportura creation; Standing out from the crowd – Sportura mods are rare, making your watch truly one-of-a-kind-.
Custom-Made – Not a Mass-Produced Part – The SNPO55J1/SNP055J1 is not a mainstream modding platform-. Unlike SKX007 or SRPD series with extensive aftermarket support-, this case is custom-produced to order. Please allow for longer lead times and confirm your specific requirements before ordering.
Important Compatibility Note – This case is custom-made to order and requires exact specifications from your original case. Before ordering, please provide: case outer diameter, inner diameter, crown position, and movement ring dimensions. Not compatible with standard NH35/NH36 movements- – this case is specifically for the 7D48 Kinetic movement-. Professional installation recommended.
