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Seiko (TMI) NH72 Automatic Movement - Skeleton Ruthenium Grey
$98 SGD - $128 SGD
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The full skeleton, dial-side.
Genuine Seiko NH72 automatic movement: a full skeleton display in ruthenium grey with a Côtes de Genève decorated rotor. Built for an open, skeletonised view of the entire movement from the watch face, the bridges, gear train, and decorated rotor all on show. The choice when the movement itself is the dial.
Two accuracy grades. One genuine Seiko caliber, QC-passed by TMI.
Pick Regulated for watchmaker-tuned precision, or Non-Regulated for Seiko factory spec. Every unit is a genuine Time Module Inc. movement, tested functional before it ships.
The movement is the dial.
A fully skeletonised top plate gives a complete view of the gear train and decorated rotor from the front. No separate dial design competes with it, the mechanism is the aesthetic.
Regulated or non-regulated.
Choose Regulated and a certified watchmaker tunes it to 0 to +8 seconds/day before it ships. Choose Non-Regulated for factory-default accuracy of -20 to +40 seconds/day per Seiko's spec. Same movement, your call on precision.
Hacking and hand-winding.
Both built in. The seconds hand stops when you pull the crown for precise time-setting, and you can manually wind it. The popular reason modders upgrade from older 7S26/7S36 calibers.
Spacer fitted, ready to seat.
Ships with a dial holding spacer already fitted for straightforward installation, plus a full-length threaded stem and a dummy stem with plastic crown.
How the NH family compares
| Caliber | Complication | Crown Position | Version |
|---|---|---|---|
| NH34 | GMT + Date | 3 or 4 o'clock | White |
| NH35 | Date | 3 or 4 o'clock | Black White |
| NH35 | Date · 6 o'clock dial | 3 or 4 o'clock | Black White |
| NH36 | Day + Date | 3 o'clock only | Black White |
| NH36 | Day + Date | 4 o'clock only | Black White |
| NH38 | Open Heart (no date) | 3 or 4 o'clock | View |
| NH70 / 71 / 72 · THIS MOVEMENT | Skeleton (no date) | 3 or 4 o'clock | NH72 |
Most NH movements fit either a 3 or 4 o'clock crown — the stem threads either way and the date disc isn't affected. The NH36 is the exception: its day wheel is pre-aligned for one crown position, so pick the standard (3 o'clock) or the 4 o'clock version to match your case. Every caliber shares the same 24-jewel automatic platform, 21,600 vph beat rate, and 41+ hour power reserve. Click any version to go straight to that product.
For experienced modders only
Movement swapping is recommended only for individuals with the right skills and experience. Every movement passes Time Module Inc. (TMI) quality control before shipping and is guaranteed fully functional on arrival. Given the DIY nature of modding and Seiko's trade practices, movements cannot be returned once shipped. We are not responsible for damage incurred during fitting.
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- Manufacturer Time Module Inc. (TMI)
- Caliber NH72A
- Movement Type Automatic, Mechanical
- Hand Height Type M
- Movement Diameter 27.40mm
- Casing Diameter 29.36mm (with dial holding spacer)
- Movement Height 5.32mm
- Jewels 24 jewels
- Beats Per Hour 21,600 vph (6 vibrations per second)
- Additional Function Skeleton display (no date)
- Hacking Yes
- Manual Winding Yes
- Winding Direction Clockwise
- Power Reserve More than 41 hours
- Accuracy (Regulated) 0 to +8 seconds/day
- Accuracy (Non-Regulated) -20 to +40 seconds/day
- Hands Fitting Size H: 1.5mm, M: 0.88mm, S: 0.2mm
-
Where this movement fits
- Hand height Type M (standard) — confirm your case accepts Type M before fitting
- Our cases Skeleton-ready cases (spacer-fitted)
- Dial 28.5mm Seiko Mod dials — no-date / open dials
- Hands NH-series compatible
The NH72 is a skeleton movement meant to be seen, pair it with a skeleton or open dial and ideally a display caseback so it's visible front and back. Ships spacer-fitted for easy seating.
-
- 1x NH72 movement (dial holding spacer pre-fitted)
- 1x Full-length threaded stem
- 1x Dummy stem with plastic crown
All photos showing movements fitted with dials, hands, or cases are for illustration only and are not included with the movement purchase.
Questions, Answered
Everything worth knowing before you build.
How is the NH72 different from the NH70 and NH71?
What does the NH72 need to look its best?
What's the difference between Regulated and Non-Regulated?
Is this a Type M or Type L movement, and does it matter?
Can I return a movement if my mod doesn't work out?
NH34 vs NH35 vs NH36 vs NH38 vs NH70 — what is the actual difference?
Customers praised this skeleton automatic movement for its beauty and reliability. Reviews highlighted "well finished", "precise", and "best quality" construction. The movement arrived "faster than expected" with excellent packaging and regulation. Shoppers noted it "looks excellent from behind" even with regular dials. No significant issues reported.
- The skeleton movement is precise and has to be my favorite mod thus far.
- It is well finished and is very reliable.
- This movement is beautiful! It still looks excellent from behind.
Quality (positive)Appearance (positive)Regulation (positive)Movement (positive)Packaging (positive)
J
Using this mod part for: Aftermarket cases sub style + jubilee
Very nice product well regulated and well packaged. Arrived faster than expected. I am very happy.
T
I love it ,it's beautiful
J
Using this mod part for: All models, mainly SkX007
I’ve been modding for at least 2 years now and you guys are by far the best one stop shop out there. The quality is 10/10. The skeleton movement is precise and has to be my favorite mod thus far. Overall experience Is easily 10/10
L
Using this mod part for: GS
Excellent !
K
Using this mod part for: Seikonaut case
Well packaged and easy to track . Showed up quicker than expected . Products even better than expected .
j
Using this mod part for: Skx007
Looks great and arrived quickly
M
Using this mod part for: The case is aftermarket bell& Ross which will be a skeleton the back is non crystal
Extremely fast delivery the packaging was well done the movement itself is great and I especially liked the note from Adriel
M
I love this movement. It is well finished and is very reliable. Adriel is a great and reliable seller.
B
Regulation was perfect and product showed up faster than expected.
M
This movement is beautiful! I fit it with a regular dial and it still looks excellent from behind.
J
Will you be restocking the regulated version of the NH72?
Hello Justin!
Thanks for expressing interest in our mod parts!
Nope. We will not be bringing in more NH7x.
Hope this helps. Let me know if you have anymore questions.
Cheers,
Adriel
K
Does this fit the Seikonaut case . Not in the list of add ons but is a new item .?
Hello Kent!
Thanks for expressing interest in our mod parts!
>> Does this fit the Seikonaut case
Yes. Fits all our cases.
>> Not in the list of add ons but is a new item .?
Thanks for reminding me. Dropdown list was not updated.
Hope this helps. Let me know if you have anymore questions.
Cheers,
Adriel
