Seiko Bruce Wayne GMT Mod
Seiko Bruce Wayne GMT Mod
Made to be looked at twice.
diamond=== Genuine Seiko movement, sapphire crystal and a solid stainless steel case. Built to wear every day.
Watch sizing
| Case size | Suits wrists | How it wears |
|---|---|---|
| 36 mm | 14–17 cm | Slimmer and dressier |
| 39–41 mm | 16–20 cm | The classic full look |
Every bracelet adjusts to your wrist with the included screwdriver. If you're between sizes, pick the look you prefer.
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published_with_changes Change your mind within 24 hours of ordering? Full refund, no questions.
check_circle Faulty or not as described? Repaired, replaced or refunded.
- local_shipping Free worldwide shipping
- verified_user 1-year warranty
- place Inspected before dispatch
card_giftcard Every watch ships with a travel case + sizing tool.
All black, and no announcement.
Black dial, black bezel, steel bracelet. Nothing on it shouts, which is exactly why it holds up in a meeting, at dinner, and on a 6am flight in the same shirt. The design it echoes sits behind jeweller's glass.
The pleasure is private with this one. You turn your wrist, the bezel catches a thin line of light, and the fourth hand quietly tells you what time it is somewhere else. Nobody else has to be involved in any of it.
A second time zone, and no battery
The heart is the Seiko NH34 GMT automatic: a fourth hand tracking a second time zone, 21,600 beats per hour, hacking seconds, hand-winding, approx. 41-hour power reserve. No battery, ever.
Around it: a stainless steel case, a sapphire crystal that shrugs off keys and door frames, and a bezel finished in the same black as the dial, so the whole face reads as one piece.
| Movement | Seiko NH34 GMT automatic, 21,600 bph, approx. 41-hour power reserve |
| Dial | Black |
| Bezel | Black |
| Bracelet | Stainless steel |
| Crystal | Sapphire |
| Water rating | 5 ATM |
What this price actually buys
The watch this design echoes sells for more than sixty times this price, and a routine service on it costs more than this entire watch. Here, one price buys the whole thing: a genuine Seiko automatic under sapphire, built to order for you and regulated by hand. Nobody needs to know what it cost. That part is yours.
Order yours and start your build. You will get photos of your finished watch before it ships. Then you will get the watch.
Why collectors call it the Bruce Wayne
The Seiko Bruce Wayne GMT is the nickname collectors gave this stealth black and grey colourway: the daytime half of the bezel in grey, the night half in black, nothing in colour. The name stuck because the look is exactly that, a billionaire in a black suit rather than the cape. A Seiko GMT Bruce Wayne mod pairs that colourway with the NH34 movement, so the fourth hand is a true, independently set second time zone rather than a printed one.
New to this build? Read the Bruce Wayne Seiko mod guide: what it is and what to check before you buy.
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What's included
What's included
Every order arrives with your watch, a travel case and a sizing tool for adjusting the bracelet. Inspected before dispatch and backed by a 1-year warranty.
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Sizing & fit
Sizing & fit
Stainless steel case and bracelet. Where more than one case size is offered, choose yours from the size selector above. Smaller sizes suit slimmer wrists, larger sizes wear with more presence. A screwdriver is included so you can adjust the bracelet links to your wrist at home. Not sure which size suits you? Message us before you order and we will help.
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Shipping & returns
Shipping & returns
Every watch is made to order, with free worldwide shipping. Build and dispatch times are set out in our Shipping Policy. Because each watch is built to the specification you choose, we do not accept returns for change of mind. Changed your mind before we start? Email us within 24 hours of ordering and we will cancel and refund you in full. If anything is wrong with your watch we fix it: a fault, transit damage or the wrong model is repaired, replaced or refunded, and we pay the postage both ways. Orders outside Australia may attract import duty, tax or VAT on arrival. These are set by your local customs authority and are the customer's responsibility.
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Warranty
Warranty
Backed by a 1-year warranty against manufacturing faults in the movement, crystal, case and dial. Faulty or not as described? We repair, replace or refund at no cost to you.
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What is a Seiko mod?
What is a Seiko mod?
A watch built on a genuine Seiko automatic movement (the NH-series mechanical calibre Seiko uses in its own watches), fitted with a custom case, dial, hands and bracelet in a design inspired by iconic timepieces. Self-winding, no battery, serviceable for decades. It's not a copy of anyone's watch and we never pretend otherwise: it's the mechanical heart you want, without the luxury markup. Read the full story.
GMT (Bruce Wayne) | NH34 Custom Mod Watch

How it works
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1. Choose your watch
Pick the design and case size you want.
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2. Made to order
Built on a genuine Japanese automatic movement and inspected before dispatch.
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3. Delivered with care
Free worldwide shipping, backed by a 1-year warranty.
Questions people ask before ordering
Is this a real watch or a fake?
It is a real watch and an original Rosevari build. Inside is a genuine Seiko automatic movement; the case, sapphire crystal and dial are parts we choose and stand behind. A fake is sold as the genuine article. Every Rosevari is sold openly as exactly what it is, a custom Seiko mod, with every part disclosed.
Is it automatic?
Every watch runs a genuine Seiko movement. GMT models use the self-winding NH34 automatic with an independently set GMT hand, datejust styles use the NH35 automatic, and chronograph builds use the VK63 meca-quartz. The exact movement for this watch is named in the specifications above.
How much does it cost?
This build is $399.00 AUD with free shipping. Prices are shown in Australian dollars for Australian customers, and there are no extra charges at checkout for AU orders.
How long until it is on my wrist?
Every watch is made to order. Build and dispatch times are set out in our Shipping Policy. If it arrives faulty, damaged in transit, or not what you ordered, we repair, replace or refund it and pay the postage both ways.