MASTER MOD - BLACK MOON

The Master Mod Black Moon brings together two complications that watchmakers have associated with mastery for over a century — the chronograph and the moonphase — in a 40 mm package driven by the Seiko VK63 mecha-quartz hybrid. The "Black Moon" name is not decoration: the watch's dark aesthetic and the celestial display at the subdial position create a visual language that is genuinely distinctive, and the tachymeter bezel adds the purposeful edge of a precision timing instrument. This is a Seiko mod for the collector who wants more than a simple three-hander.

Movement

The Seiko VK63 mecha-quartz inside the Master Mod delivers the functional chronograph the dial promises: a 60-minute counter subdial, a running seconds subdial, and a 24-hour indicator — all driven by the VK63's mechanical gear train, which is motivated by a quartz oscillator. This means the chronograph seconds hand sweeps rather than ticks, giving the watch the feel of a mechanical chronograph without the service intervals and cost. The tachymeter bezel rim allows speed calculations using the chronograph function. The screw-down crown and pusher arrangement at two and four o'clock are built for regular use.

Case & Crystal

The 40 mm stainless steel case is solid without being heavy, with a robust solid stainless steel caseback — chosen here for the depth of the movement stack and for a cleaner, more finished rear aesthetic on a watch of this complication level. The screw-down crown delivers 5 ATM water resistance, adequate for everyday wear. The sapphire crystal is treated with Super-LumiNova across the dial layout and carries an anti-reflective coating, ensuring the subdial registers and moonphase display remain readable at a range of angles and lighting conditions.

Dial & Design

The Black Moon dial is a composition exercise: three subdials positioned symmetrically around the dial face, a moonphase display that adds a celestial quality to an otherwise sporty watch, and a tachymeter scale around the outer bezel rim. The all-dark palette lets the individual elements speak clearly without visual crowding. Super-LumiNova on the main hands and hour markers ensures the watch reads cleanly in low light, even if the subdial details are better appreciated in daylight. The moonphase complication adds an analogue display of the lunar cycle — a genuinely interesting piece of information for the owner who pays attention to it.

On the Wrist

At 40 mm the Master Mod Black Moon is a substantial but not overwhelming presence on the wrist. The solid caseback keeps the profile tighter than an exhibition version would, and the overall watch wears with the seriousness the dial composition deserves. It is a watch that invites inspection — people will look at the subdials, notice the moonphase, and ask what it does. That conversation is part of the appeal.

Why MedoMods

Hand-assembled in Germany, individually inspected, and shipped within the EU without customs complications. The Master Mod Black Moon is a Seiko mod that delivers genuine multi-complication functionality — functional chronograph, moonphase display, 24-hour indicator — in a handcrafted piece at a price point that the complications involved would not ordinarily reach. If you want a watch with something to say on the wrist and something to explain to anyone who asks, this is it.

• Case: 40 mm stainless steel – balanced and modern

• Movement: Seiko VK63 mecha-quartz – quartz precision with mechanical gear train

• Crystal: Sapphire with Super-LumiNova – clear visibility and excellent readability

• Crown & Water Resistance: Screw-down crown, 5 ATM – secure and suitable for everyday wear

• Bezel: Tachymeter – for precise speed measurements using the chronograph

• Case Back: Solid stainless steel – robust and refined

• Chronograph: 60-minute counter, 24-hour subdial, running seconds