

Seiko Mod Black Bay Chrono Black
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1 YEAR WARRANTY INCLUDED
Introducing the Seiko Mod Black Bay Chrono Black — a Black Bay-inspired chronograph that's hand-built as a premium Seiko Mod. It fuses quartz reliability with a mechanical chronograph module for a precise, tactile experience you can feel with every second.
- Movement: Seiko VK64 Chronograph (Meca-Quartz) delivers quartz accuracy plus a smooth, mechanical chronograph sweep and crisp, snap-back reset.
- Case & Crystal: 40 mm diameter, 12 mm thick, 316L stainless steel case with a sapphire crystal treated to resist scratches and reflections; black ceramic bezel for enduring contrast.
- Dial & Hands: Black dial with black subdials and silver-tone hands for legible, refined contrast.
- Bracelet & Fit: 316L stainless steel bracelet with security clasp; lug width 20 mm; adjustable from 14.5 cm to 22 cm for a precise fit.
- Durability: 3 ATM water resistance, screw-down crown, and a closed steel case back designed for everyday wear and occasional splash protection.
Designed for watch enthusiasts seeking a versatile, everyday-to-formal chronograph, the Seibay Chrono Black pairs a timeless silhouette with modern reliability. It’s the ideal balance of classic aesthetics and practical performance, tailored for those who demand detail, craftsmanship, and standout presence in one compact package.
WHAT INCLUDED?
- Premium watch box
- Watch tool set for adjustments
- 1 year limited warranty
- Lifetime aftercare support
- Exclusive offers and first to know about new releases
SHIPPING & RETURNS
Free Express Shipping on orders over $150. Duties and taxes are included. Shipping takes 7-10 business days in the US, and 9-15 business days internationally.
Returns: We offer a 14-day return policy on all orders. To initiate a return, please contact our customer service team at info@auro-support.com
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SEIKOBLACKBAY
The SEIKOBLACKBAY Chrono channels its heritage into a sport-chic chronograph with bold, contrasting sub-counters and a high-performance meca-quartz caliber that delivers a smooth sweep and crisp snap-back reset. Born from motor racing, it unites purposeful design with precise timing—a track-ready instrument evolved into a modern icon, engineered for speed yet refined for everyday wear.

BLACK BAY CERAMIC
As a statement piece, the Black Bay Ceramic reflects AURO’s command of strict chronometric and magnetic-resistance criteria. Certified through METAS testing, it stands as a pure expression of contemporary, high-technology style.

MAKING THE CASE
Every Black Bay begins life as a solid 316L stainless-steel blank, slightly thicker than the finished case. Using subtractive manufacturing, the blank is milled down with minimal waste: the interior is opened first, followed by the outer profile. This early case is then precisely machined into the Black Bay’s signature silhouette, heat-treated and strengthened, and finally hand-finished in a mix of brushed, polished, and satin textures to create depth and visual interest.
Working with stainless steel is complex, but in the end, it’s what lends a unique character to the Black Bay.

HYBRID MECA-QUARTZ MOVEMENT
"Meca-quartz" hybrid watch movement that combines a quartz timekeeping base with a mechanical-style chronograph module, offering the best of both worlds: high accuracy from the quartz components and the satisfying tactile feel of a mechanical watch, including a smooth sweeping chronograph hand and instant reset. This hybrid design results in a durable, reliable, and affordable movement that provides mechanical-like operation with the superior timekeeping precision of quartz.
CUSTOMER REVIEWS
What our customers say
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Frequently Asked Questions
Seiko VK64 mecha-quartz chronograph—quartz timekeeping for accuracy + a mechanical chrono module for a smooth sweep and crisp snap-back reset.
Yes. VK64 is a bi-compax layout: a 60-minute chronograph counter (9 o’clock) and a 24-hour indicator (3 o’clock), plus a central sweeping chronograph seconds. VK64 models typically do not show running (time) seconds and do not have a date.
Most BlackBay builds are around 40 mm diameter, ~12 mm thick, 47–48 mm lug-to-lug, with a 20 mm lug width (see each product page for exact specs).
Accuracy is typically ±20 sec/month. Battery life is about 2–3 years under normal use (heavy chrono use reduces it slightly).
Yes—start/stop/reset cycles, hand centering, alignment, gasket checks, and final QC are completed on every build.
Rinse case/bracelet with fresh water after salt/sweat, dry with a microfiber, avoid harsh chemicals, and keep away from strong magnets.
Top pusher (2 o’clock) starts/stops; bottom pusher (4 o’clock) resets. On VK64, the chrono seconds snaps back cleanly to 12.
