Seiko Mod SKX007 42mm - 01

This 42mm SKX007-inspired custom watch combines a black-finished 316L stainless-steel case with a brushed steel timing bezel, dark day-date dial, gold-tone crown, and a distinctive Star of David detail at the center. The result is a purposeful automatic watch with a personal identity rather than a standard catalogue configuration.

A Dark SKX007-Inspired Build with Warm Metal Details

The black case and rubber strap give the watch a practical, tool-watch foundation. Against that darker base, the steel bezel and gold-tone details become the visual focus. Round hour markers and broad hands keep the dial readable, while the day-date display adds everyday usefulness without overwhelming the layout.

This is a workshop-built composition, selected and assembled as a complete watch rather than presented as an original Seiko factory model. Explore more completed projects in the Rexx Seiko mod collection.

Japanese NH36 Automatic Movement

Inside is a Japanese NH36 automatic movement with day and date functions. The movement winds through normal wrist motion and can also be wound by hand. Its hacking function stops the seconds hand while setting the time, making precise adjustment easier.

The movement is protected by a solid stainless-steel caseback. That closed-back construction suits the watch's understated tool-watch character and keeps the focus on the dial, bezel, and contrasting finishes.

Materials and Dimensions

• Movement: Japanese NH36 automatic, with hand-winding and hacking
• Functions: Hours, minutes, seconds, day, and date
• Case: Black-finished 316L stainless steel
• Case diameter: 42mm, excluding the crown
• Crystal: Sapphire crystal
• Strap: Black rubber
• Caseback: Solid stainless steel
• Water resistance: Stated 10 ATM rating

Built for Daily Wear

The rubber strap, sapphire crystal, and legible day-date layout make this configuration easy to wear regularly. Its 42mm diameter gives it clear wrist presence, while the dark case and restrained color palette keep it more controlled than a brightly finished diver.

The stated 10 ATM rating supports normal daily use around water. As with any mechanical watch, seals should be checked periodically if the watch is regularly exposed to water, and the crown should always be fully secured before contact with water.

Workshop Context and Custom Options

Rexx Timepieces builds and finishes custom mechanical watches in a real workshop environment. For a closer look at movements, cases, dials, and build decisions, visit Knowledge & Guides. To discuss a watch built around your own dial, colors, case direction, or personal idea, start with Build Your Custom Watch.

Rexx Timepieces is an independent workshop. This custom build is not manufactured, sponsored, or endorsed by Seiko.