39mm Dive Watch Case BB58 Mod 20BAR Waterproof Dome Sapphire Glass 39mm Black Bay Watch Case for NH34 NH35 NH36 NH70 ETA2824 PT5000 Watch Parts Color:Grey Bezel insert making this a functional tool

making this a functional tool for both professional and recreational divers

offering a refined and modern appearance

Building a watch requires specific tools (hand setters

driven by the precise NH35A automatic movement with 24 jewels

39mm Dive Watch Case BB58 Mod 20BAR Waterproof Dome Sapphire Glass 39mm Black Bay Watch Case for NH34 NH35 NH36 NH70 ETA2824 PT5000 Watch Parts Color:Grey Bezel insert making this a functional toolThis 39mm dive watch case is a classic BB58 mod design, built for professional watch modding and custom builds. Made from solid 316L stainless steel with black or rose gold coating, it features a domed sapphire crystal, 20BAR (200m) water resistance, and broad movement compatibility. Ideal for NH and ETA based automatic movements, this case offers durability, vintage proportions, and a premium diver aesthetic. Custom logo service is supported.