39mm Stainless Steel Automatic Watch Case – Sapphire Crystal – 20 ATM

A versatile 39mm stainless-steel automatic watch case designed for custom watch builds, modifications and replacement projects.

The compact 39mm diameter gives the case a balanced, traditional profile, while the 48.6mm lug-to-lug measurement provides a substantial wrist presence without becoming oversized.

Constructed from solid stainless steel, the case features a sapphire crystal, screw-down crown and stainless-steel caseback. A 20 ATM / 200 metre manufacturer-rated water-resistance specification makes this a particularly robust foundation for sports, field and everyday automatic watch builds.

The case accepts a wide selection of popular automatic movements, including Seiko/TMI NH-series movements as well as several ETA 2824-compatible calibres.

Supplied as a case only, ready for your choice of movement, dial, hands and 20mm strap or bracelet.

Please note: Water resistance of a completed watch depends on correct assembly, gasket condition, crown installation and pressure testing. The 20 ATM specification refers to the case manufacturer's rating and should not be assumed for a completed custom build unless pressure tested.