Instinct Time
SEIKOMARINER BLACK
SEIKOMARINER BLACK
*Ships In 1 Business Day!*
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The Seikomariner Black is a clean, confident take on one of the most timeless silhouettes in watch history. Inspired by the legendary Submariner, this custom mod brings precision engineering and bold styling together in one versatile timepiece.
Powered by the dependable NH35A automatic movement, it features 24 jewels, a quick-set date, and a hacking function for to-the-second accuracy. The polished stainless steel case pairs seamlessly with a classic black dial and ceramic bezel, offering a sleek, minimalist look that never goes out of style.
Luminous Mercedes-style hands and markers provide clear visibility, while the sapphire crystal and screw-down crown ensure durability for everyday wear.
Specifications at a Glance:
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Movement: NH35A Automatic – 24 jewels, quick-set date, hacking feature
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Case Diameter: 40mm – ideal for daily wear
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Case Thickness: 14.3mm – bold yet balanced
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Case Material: Stainless Steel – polished finish
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Crystal: Sapphire crystal glass – scratch-resistant and clear
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Bezel: Black polished ceramic – one-way rotating
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Water Resistance: 3 ATM (30 meters) – safe from splashes and rain
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Bracelet: Stainless steel with adjustable links
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Lug Width: 20mm – compatible with most strap options
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Weight: 162 grams – comfortable yet substantial
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Features: Screw-down crown, luminous dial, Mercedes-style hands
Why You’ll Love It:
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Classic all-black dive aesthetic with modern mod details
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Built tough for everyday wear, with high-end components throughout
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Custom Seiko build with timeless appeal and lasting reliability
The Seikomariner Black is the go-to timepiece for those who value simplicity, strength, and iconic design.
Instinct Time – Built Different. Worn Bold.
NEED HELP?
FREQUENTLY ASKED QUESTIONS
What is a Seiko Mod?
A Seiko Mod is a custom-built watch crafted using Seiko's renowned automatic movements, combined with premium aftermarket components. These include durable stainless steel, scratch-resistant sapphire crystal, and even 18k gold-plated steel for added luxury.
The beauty of a Seiko Mod lies in its uniqueness. With an extensive range of aftermarket parts, we can create a one of a kind timepiece tailored to your personal style and preferences.
Shipping Time?
At Instinct Time, all of our watches are shipped directly from Melbourne, Australia. We prioritize quick processing and aim to dispatch your order within 1 business day.
We partner with Australia Post to ensure reliable delivery, and every order includes a tracking number for your peace of mind. You can typically expect your watch to arrive within 2–5 business days, depending on your location. Unlike other mod builders who may take weeks to process and ship, we pride ourselves on offering a faster and more efficient service.
Can I adjust the strap size myself?
Absolutely! All of our watches include a link removal tool kit, allowing you to easily adjust the strap for a comfortable and perfect fit.
12-Month Warranty
All of our watches come with a 12-month international warranty, ensuring peace of mind with your purchase. Each watch includes a warranty card provided at the time of purchase. In the rare event of an issue, please don’t hesitate to reach out to our team for any warranty inquiries or assistance.
Is it possible to remove the Seiko logo?
Absolutely! We offer custom watch-building services to bring your vision to life. Please email us atinstincttime.melbourne@gmail.comwith your requirements before placing an order, including any specific details you'd like us to consider. Please note that custom watches typically take 2 weeks to assemble.
I received my customised watch today and it was on point to my specification. Communication with Vincent was impeccable and he was able to build my watch in detail and quickly too. This is now my everyday wear watch. Thank you & you’ll definitely hear from me again. He sent me the links that he removed from the bracelet and included a tool kit for future resizing.
I had trouble resizing the watch at first. It was completely my fault as i tried to remove the last link the in the bracelet that shouldn’t have been removed and ended up bending one of the screws. I emailed Vincent who generously said to ship it back so he can fix it for me. Within a week it was shipped to and from Sydney to Melbourne and back to Sydney all fixed.
The watch itself is an amazing piece of art. I love winding the automatic NH35 watch and watching it tick away. The Seiko mariner is such a classic piece - it’s timeless beauty!
The service I’ve seen with Vincent with the quick responses is on another level. He’s definitely earned my trust as a customer. Recommended my neighbour to buy his first Seiko mod and i also ended up buying my second piece immediately: a white panda Seiko Daytona.
Thanks for the experience, Vincent.
Good price great product
Delivered early, great service and communication. High quality watch as described in matching quality box and packaging. A highly recommended watch and seller.
Beautiful watch and prompt delivery.
