Seiko (TMI) NH35 Automatic Movement - Date (Black)

Name: Seiko (TMI) NH35 Automatic Movement - Date (Black)
Brand: SEIKO
SKU: NH35 B.Reg.
Price: 185.0 SGD
Availability: InStock
Rating: 5.0 (11 reviews)

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$135 SGD - $185 SGD

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The workhorse date movement.

Genuine Seiko NH35 automatic movement with date function, crown at 3 o'clock, with black date wheel. The default choice for a date build and the most common upgrade from older 7S26/7S36 calibers, adding hacking and hand-winding the older movements lack.

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.

Date, done simply.
A clean date complication with quick-set correction. Crown out one click to set the date, two clicks to hack and set the time. The most-used movement in the Seiko mod world for good reason.

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.

In every box.
Each movement ships with a full-length threaded stem and a dummy stem with plastic crown. Additional full-length threaded stems are available separately.

How the NH family compares

Caliber	Complication	Crown Position	Version
NH34	GMT + Date	3 or 4 o'clock	White
NH35 · THIS MOVEMENT	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	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.

Specs
Compatibility
What's Included
How To Mod

1. Manufacturer Time Module Inc. (TMI)
2. Caliber NH35A
3. Movement Type Automatic, Mechanical
4. Hand Height Type M
5. Movement Diameter 27.40mm
6. Casing Diameter 29.36mm (with dial holding spacer)
7. Movement Height 5.32mm
8. Jewels 24 jewels
9. Beats Per Hour 21,600 vph (6 vibrations per second)
10. Additional Function Date display
11. Hacking Yes
12. Manual Winding Yes
13. Winding Direction Clockwise
14. Power Reserve More than 41 hours
15. Accuracy (Regulated) 0 to +8 seconds/day
16. Accuracy (Non-Regulated) -20 to +40 seconds/day
17. Hands Fitting Size H: 1.5mm, M: 0.88mm, S: 0.2mm
Where this movement fits
1. Hand height Type M (standard) — confirm your case accepts Type M before fitting
2. Our cases All Ultra Thin Edition cases (TYPE M)
3. Dial 28.5mm Seiko Mod dials — match the date aperture to the movement
4. Hands NH-series compatible
A date dial pairs with the NH35, the date window must line up with the dial's aperture (3 o'clock). Fits every Ultra Thin Edition case that takes a TYPE M movement.
1. 1x NH35 movement
2. 1x Full-length threaded stem
3. 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.

Which dial does the NH35 need?

The NH35 is a date movement, so it takes a date dial — the date window lines up at the 3 o'clock position. It also runs fine behind a no-date dial (the date wheel just turns unseen). Many modders pick an NH35 to keep the option of swapping to a date dial later.

Will the NH35 fit a 3 or 4 o'clock crown case?

Yes, either. The NH35 is a date-only movement, so the crown stem threads at 3 or 4 o'clock and the date disc isn't affected — the dial's date window position is what changes, not the movement. (The day+date NH36 is the one caliber where crown position is fixed, because of its day wheel.)

What's the difference between Regulated and Non-Regulated?

Regulated movements are tuned by a certified watchmaker to 0 to +8 seconds per day before they ship. Non-Regulated movements run at Seiko's factory-default accuracy of -20 to +40 seconds per day. It's the same movement either way — Regulated just buys you tighter timekeeping out of the box.

Is this a Type M or Type L movement, and does it matter?

This is a Type M movement. Type M and Type L are Seiko's two factory hand-fitting heights; Type L sits about 0.4mm taller. Ultra Thin Edition cases have tight hand-to-sapphire clearance, so they take Type M only. Always confirm Type M before fitting.

Can I return a movement if my mod doesn't work out?

Movements can't be returned once shipped. Given the DIY nature of modding and Seiko's trade practices, all movement sales are final. Every unit passes TMI quality control and is guaranteed fully functional on arrival — but the fitting itself is at your own risk, so this movement is recommended for experienced modders only.

NH34 vs NH35 vs NH36 vs NH38 vs NH70 — what is the actual difference?

They are the same movement — only the complication differs. Every one: 24 jewels, −20 to +40 sec/day, 21,600 vph, 41h power reserve, casing Ø29.36mm with the spacer.

| Movement | Shows |
|---|---|
| **NH34** | Date + GMT |
| **NH35** | Date |
| **NH36** | Day date |
| **NH38** | Open Heart |
| **NH70/71/72** | Skeleton |

All of them hack (the seconds hand stops while you set). On the NH38 and the NH70 family the crown has one click and it sets the time, so a no-date dial belongs on an NH38 — there is no empty date position to pull past.

Only the height differs: 7.59mm installed, 7.99mm for the NH34. That extra 0.4mm of hand stack is why a GMT needs a case built for it. Otherwise the family is interchangeable — you are choosing a dial and a crown behaviour, not a different-sized engine.

The NH35 automatic movement receives universal praise from watch modders. Customers said the regulated movements run exceptionally accurate, with one reporting "+3 seconds in all positions." Shoppers highlight "best pricing," "quick shipping," proper packaging, and responsive service. The black date wheel version is particularly appreciated for builds.

Running within +3 seconds in all positions with several zeros in different positions.
Quick shipping, proper packaging, handwritten note included - everything screams quality!
Best pricing, great & responsive service, and quick shipping. Highly recommend them.

Movement (positive)Shipping (positive)Price (positive)Quality (positive)Packaging (positive)

5 stars: 11 (100%)
4 stars: 0 (0%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Using this mod part for: None

Fully deliver

The order was regulated.
And it is proven LA deliver this well
Very good 👍

Using this mod part for: Pro Diver

I messed up...

So in short I have a modded Pro Diver that I've turned into a vintage sub... I was trying to put the old movement in a different case, put the wrong crown stem in and did some nasty work to the old NH35. THANKFUL Adriel is a legend and stocks great movements. So I was able to pick up a new NH35 but the black date wheel version which is much nicer. My old movement is now in bits as I love learning how these things work, given its broken I figured now was a great time to crack it open. 10/10 on both the product and service as always. Cheers Adriel!

Using this mod part for: Custom Build

Fantastic Seiko Mod Supplier

I've shopped around at a bunch of suppliers for Seiko NH movements, and Lucius Atelier has become my Go-To for the NH35. They have the best pricing, great & responsive service, and (super important) quick shipping. I highly recommend them.

Using this mod part for: Aftermarket Case (Diver)

Outstanding

Quick shipping, constant status update on order by email, proper mouvement packaging when received, custom handwritten note included in the order, mouvement looks good = simply lovely! What more to say, everything about this experience screams quality. Will be back to buy more for sure!

Using this mod part for: Aftermarket case

Perfect

First time buyer, smooth transaction and fast shipping.
Not fitted into my latest build yet as I’m still gathering some more parts. But overall great service will be buying again. Thank you!

Using this mod part for: Not Mods, but custom manufacture.

Just what the maker ordered!

I decided to splurge on the extra cost of a regulated movement and was not disappointed. The movement arrived today and I immediately wound it up and let it settle in for 10 minutes. Flipped on my timegrapher and...voila. Running within +3 seconds in all positions with several zeros in different positions. As a maker I could not be happier. This will save me so much time during assembly in the future because yes, I will be a repeat customer. Thank you Adrian!

Using this mod part for: Skx007

Good price and working well

Already fitted into my latest build and working exactly as I hoped. Very good

Great service!!!

Such great service will be buying again !

Smooth transaction

First time buyer, smooth transaction and fast shipping

Very nice dial and movement. Immaculate support and very quick shipping

Hello,

Do you think you will have more "regulated Seiko (TMI) NH35 Automatic Movement - Date (Black)" back in stock soon?

Thanks,

Mr Rahman

Adriel from LuciusAtelier.com

Hi Mr Rahman,

Thanks for expressing interest in our mod parts!

Yes, we’re expecting the Regulated NH35 Black to be back in stock around late January to early February.

Appreciate your patience, and feel free to check back anytime.

Best regards,
Adriel
Lucius Atelier

When I buy a movement with you does it come with a movement holder? I have only built one watch so far with DIY Watch Club, so I'm looking to do my next watch on my own. Thanks!

Hi Devon,

Thank you for expressing interest in our mod parts!

Movement holder? What's that? Are you referring to a dial holding spacer? If so, then yes! By default, Seiko supplies NH34/35/36/38 movements with a dial holding spacer. Seiko does not sell these movements without it, so you're all set in that regard.

Best of luck with your next watch build! If you have any questions, don't hesitate to ask.

Best regards,
Adriel

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