Jadeion Tamahagane Epoxy Tuna Automatic Watch

Model Tamahagane Epoxy Tuna

Quick Overview
Seiko NH35A Automatic Movement
100 Feet Water Resistant (tested)
Brand New 10+ Rating*
Original Custom Build
Jadeion Price US $425

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- Features -

Case Size

45 mm

Band Size

22 mm


Custom Made Sterling Silver Tamahagane Dial (no lume) with Chrome Hands and Orange Second Hand (Green lume)

Water Resistance

3ATM [Scuba Diving]

Screw-down Crown


Sapphire Crystal


Hour Time, Date


Stainless Steel Braclet

Case Material

Silver Stainless Steel

- Description -

Jadeion Designed Tamahagane Epoxy Tuna (Seiko NH35 Movement) Automatic Watch

This is a brand new (refurbished case), one-of-a-kind, fully custom built watch by Jadeion. It is featured as a new line-up of beautiful original designed watches made exclusively by us and for those looking for a beautiful original build.

This is our original design "Tamahagane Epoxy Tuna" build that features a custom made .925 sterling silver dial. It is run by a Seiko NH35A automatic movement with hand winding and hacking.  

The watch has been professionally hand made by Jadeion and is ready to ship!


45mm 316l stainless steel Tuna case.

Silver 120 click stainless steel bezel.

Sapphire Crystal with blue AR.

Stainless steel casback with etched skeleton frog.

Stainless steel screw-down crown.

FULLY CUSTOM .925 sterling silver Tamahagane dial (non lume)

Chrome arrow hands with orang second hand (green lume)

Beautiful HAND-MADE high-gloss custom/epoxy resin insert with .925 sterling silver with Tamahagane design (matching the dial) with slight green lume. Note: The insert is HAND-MADE and imperfections in the epoxy are a part of this process, which we believe makes them unique. The epoxy itself is very hard and UV resistant to hold up to the elements and light abuse. The lume process is done by mixing C3 powdered lume in with the epoxy during application over the original alloy insert. This makes the insert INCREDIBLY pliable and resilient.

Seiko NH35A hacking and hand-winding movement, which has been time-graphed and adjusted to keep the best time possible.

22mm stainless steel bracelet with clasp.

Watch has been time-graphed for accuracy and water pressure tested and passed at 3ATM.


Although on average we pressure test to 3ATM, most of our watches can go far deeper than that. Regardless, keep in mind that once our watches have shipped, it is the new owner's responsibility to make sure it stays that way. We will NOT be responsible for water damage due to neglect or unproperly screwing in the crown, which can cause moisture to seep into the case and the crystal to fog.

Warranty, Loyalty and Covenant Terms

1. 30 day return policy no questions asked (refunds paid when undamaged watch is returned) buyer pays shipping.

2. One year craftsmanship policy for Hands, Bezel inserts, and Movements: This means that within one year if the hands become loose, bezel insert falls out, or the movement (automatic, not battery movements) stops, we will repair and replace (including shipping) at our expense.

3. 5 year repair policy: If you break it, we’ll fix it at a discount of 20% off labor, plus parts, shipping/insurance not included.

4. 5 year update/mod policy: If you want to upgrade your timepiece, we will offer you a discount on labor at 50% off. All you’ll have to pay is for parts and shipping!

5. On our email list? Bought a watch from us? Excellent! You’ll receive special discounts based on your affiliation with our company. The more you buy, the more you save!

Please Note: We are the original manufacturer/builder of this watch. All parts are FULLY licensed to us for the use and sale of our own custom builds. Jadeionshop is not affiliated with Seiko, Omega, Citizen, Tudor, Rolex, or any other company in which our products may resemble or represent. All of our custom watches are designed solely by us and meant to be original works. Any similarities in design to any other watches are purely coincidental. Our builds are NOT intended to replicate any other company's designs or copyrighted property. Any and all use of brand names (such as dial badges and/or logos) are purchased legally through aftermarket suppliers. Jadeionshop does not assume any responsibility for any type of copyright infringement from the original suppliers of these parts. All suppliers are assumed to have permission from said companies to use their name and/or logos.


All payments are through Paypal. Mastercard, Visa, Discover, American Express can also be processed through Paypal.

Immediate payment is required. If you want to combine shipping on multiple purchases, please contact us before processing payment.

Sales tax of 6% will be charged for purchases sent to Michigan addresses.

Items will only be shipped once payment has been confirmed as received.


First and foremost we want our Jadeion customers to be completely satisfied with their buying experience. We try to post as many pictures as possible, and list any details that may effect a sale. If you are not happy with the condition of your watch purchase (item is damaged, wrong item, item does not match listing), when delivered, we do offer a 30 day return policy, with return shipping being buyers responsibility.

All watches are extensively photographed and inspected prior to shipping and are in perfect working order, unless stated otherwise. If you have a problem with a watch you purchased, please reach out to us before initiating a return

Returned items must be in the same condition as received and include any boxes, tags, paperwork, etc, that they were shipped with.

Please closely look over all photos in listings before committing to a purchase.

Return shipping is buyers responsibility

Please allow 7 business days for returns to be processed.

Refunds will only be issued to the same payment form that was used to purchase the item.


We currently ship to the continental US.

Buyer is responsible for the correct shipping address at the time of payment, and for any taxes, duties, import fees that may apply.

We ship with USPS only, within 1-2 business from the time of payment.

Shipping times by the carrier may be affected by volume (holiday season) and other circumstances (weather, pandemic, etc). You will be provided with a tracking number once package has shipped.

We will do discounted shipping on multiple items. Please contact us before processing payment.

- Condition and Rating -




Brand new and in perfect working order.

*Jadeion Rating Scale is based on condition. All watches are pre-owned, unless specifically stated as new. Scale is as follows: 1+ to 4+ would be considered trash (don't worry, you won't see that garbage here), 5-6+ may be in between homes and in search for a loving family, 7+ is dressed to impress, 8+ is more than a good looking date, 9+ is beautiful, and 10+ is like new (expect near perfection)

- Contact Us -


Jadeion, LLC

PO Box 18, Naubinway MI, 49762


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