Seiko mod price in 2026: what it costs, and where your money goes
Our least expensive watch costs €270 and our most expensive €470. A gap of two hundred euros between watches assembled on the same bench, by the same hands, with the same warranty. So the question comes up in almost every message the workshop receives: what does a Seiko mod really cost, and what justifies the difference?
The short answer: in 2026, a Seiko mod assembled in Paris by SmodParis costs €270 to €360 in steel, and €420 to €470 for our octagonal models built on a Casio base or cased in carbon. That is the price of a production automatic from Seiko, whose 5 Sports SRPD55 is listed at €320 on the brand's French website. The price comes down to five items: the movement, the external parts, the finishes, the assembly work and the service. We go through them one by one, with our current prices and the trap of cut-price watches shipped from far away.
Our 2026 prices, family by family
These are the prices shown on our product pages on 13 October 2026. Each family comes in several colours at the same price, unless stated otherwise.
| Family | What it is | Price |
|---|---|---|
| Roman Dial | Automatic, Roman numerals, fluted bezel, 36 or 39 mm | €270 |
| Fluted bezel, sunburst dial | Automatic, baton indices, 36 or 39 mm | €280 |
| Saytona | Meca-quartz chronograph with three sub-dials | €290, €320 in rose gold |
| Omeiko | Automatic, retro diver style, steel mesh bracelet | €290 |
| Diams | Automatic, stone-set indices, 36 or 39 mm | €310 |
| Nautmod | Open heart automatic | €320 |
| S Royal | Automatic, octagonal case, integrated bracelet | €320, €360 for the skeleton version |
| GMT Mod | Automatic, two-tone 24-hour bezel | €350 |
| Seitos | Automatic, square case, visible screws | €360 |
| CasiOak | Original Casio module, steel case and bracelet | €420, €450 in rose gold |
| Carbone Fit | Chronograph with a carbon case | €450 to €470 |
These prices include delivery in France, the presentation box and the 2-year warranty on movement and assembly. There is nothing to add at checkout.
Where your money goes: the five items in a Seiko mod
A Seiko mod does not come off a production line. It is a Japanese movement around which a workshop chooses every part, then assembles the whole by hand. Its price reads like a sum.
1. The movement, the item you cannot see
It is the engine, and it decides how long the watch will live. Most of our models run on a Seiko NH35, which its distributor Time Module describes as follows: 24 jewels, 21,600 vibrations per hour, three hands with date, and a seconds hand that stops when you pull the crown. A named calibre documented by its manufacturer comes at a price, where an anonymous movement costs next to nothing. It is the first line to read on a product page, and the one that best explains why two watches that look alike are not priced alike. Our three calibres are presented in the movements in our watches.
2. The external parts: case, bracelet, dial, hands, crystal
This is what you will look at every day. A stainless steel case, a bracelet with solid links, a cleanly printed dial, well-finished hands: every part exists in several grades. The crystal is a good example. Synthetic sapphire reaches 9 on the Mohs scale, so hard that it can only be worked with sapphire or diamond. Introduced by the leading brands in the late 1980s, it spread across high-end watchmaking in the 1990s, then to most quality watches. Whether it is there or not weighs on the price: the type of crystal should be written on the product page, and it is a question to ask when it is not.
3. Finishes and special materials
Almost all of our own price differences come from here. A Saytona goes from €290 to €320 in its rose gold versions. The S Royal costs €320, and €360 as a skeleton, whose openworked dial shows the movement. The CasiOak and the Carbone Fit go beyond €400 because their cases are out of the ordinary: steel machined around an original Casio module for the first, carbon for the second.
4. The workshop's work
Fitting a dial without a speck of dust, aligning three hands, checking that the date flips at midnight and not at noon: none of this shows in a photo. Yet it is what separates a watch you enjoy from a watch you send back. Our watches are assembled by hand in Paris, and that working time is in the price.
5. The service, and the State's share
Warranty, returns, delivery, presentation box: all of it has a cost, whether the seller itemises it or not. Then comes VAT, whose standard rate is 20% in France. On a price of €300 including tax, it accounts for €50. A seller who shows a tax-free price from the other side of the world is not making you a gift of it: you will pay it when the parcel arrives, as we explain below.
Seiko mod or production Seiko: the price match
We are often asked the question the other way round: why not simply buy a Seiko? It is a fair comparison, so let us make it. Seiko, founded in Tokyo in 1881 by Kintarō Hattori, is one of the very few houses able to design and manufacture every component of a watch itself. Its 5 Sports SRPD55 is an excellent way into automatic watches.
| Seiko 5 Sports SRPD55 | SmodParis Seiko mod | |
|---|---|---|
| Price | €320 (Seiko's French website) | €270 to €360 in steel |
| Movement | Seiko 4R36 automatic, 24 jewels, 21,600 vibrations per hour, power reserve of about 41 hours | Seiko NH35 automatic, 24 jewels, 21,600 vibrations per hour, in most models |
| Crystal | Hardlex, Seiko's mineral crystal | Depends on the model: ask before ordering |
| Water resistance | 10 bar | Varies: 3 ATM for the GMT Mod, 20 bar for the CasiOak |
| Style | One model: a 42.5 mm sports watch | Eleven families, from the 36 mm dress watch to the chronograph |
| Production | Industrial series | Hand-assembled in Paris |
At a comparable price, then, you are not buying the same thing. On one side, a mass-produced watch, water resistant to 10 bar, backed by the network of a global brand. On the other, a style that Seiko does not offer in its catalogue, built one at a time around a movement whose figures are the same on paper. If you want a sports watch to swim with, the production Seiko is the right choice, and we are happy to say so. If you are after a square watch with Roman numerals, an octagonal case with an integrated bracelet or a 36 mm fluted bezel, that is mod territory. Our guide what is a Seiko mod? explains this logic in detail.
The trap of the cut-price Seiko mod shipped from far away
Very cheap listings do exist, often shipped from a country outside the European Union. Before you compare, redo the sum with the rules of French customs.
- VAT is due from the first euro. If the seller did not collect it at checkout, it will be claimed from you on delivery, at the standard rate of 20%.
- Customs duties may be added. The exemption only covers distance purchases up to €150. Above that, the rate depends on the product and its origin.
- The carrier charges its own fees. French customs says so itself: these handling fees have nothing to do with its services, and carriers set their prices freely.
A watch advertised at €180 can therefore cost a good deal more once it is on your table. And the question of service remains: who do you send a watch back to when it stops after three months, and at whose expense? In France, a professional seller owes the legal guarantee of conformity for 2 years from delivery of a new item. For 24 months, the defect is presumed to have existed at the time of purchase, and repair or replacement must cost you nothing. Enforcing that right against a shop ten thousand kilometres away is another matter.
One last point, the most serious: a watch that carries the name or logo of a luxury house on its dial is not a mod, it is a counterfeit, and no price makes it worthwhile. Our 10 things to check before buying a Seiko mod go through all the warning signs.
What a Seiko mod costs after you buy it
The price of a watch does not stop at the till. The good news: an automatic is frugal.
- No battery to change. The movement winds itself with the motion of your wrist. Meca-quartz chronographs and the CasiOak, for their part, run on a battery.
- A service from time to time. For its automatic calibres, Seiko recommends an inspection with dismantling and cleaning roughly every 2 to 3 years, so that the watch keeps its performance. Ask a watchmaker for a quote before you commit: prices vary from one workshop to another.
- A movement people know how to repair. That is the advantage of a very widespread calibre: a competent watchmaker already knows it. A fashion watch with an anonymous movement goes in the bin at the first fault, which makes it, in the end, the more expensive of the two.
Spread over time, the sum is quickly done. A €300 watch worn for five years comes to €60 a year, or €5 a month. At the workshop, we often see customers hesitate for a long time over a €30 difference between two models; over five years, that difference amounts to 50 cents a month. Better to choose the one you will want to wear.
Which budget for which wish?
To find your way quickly around the range:
- Under €300: the Roman Dial at €270 and our watch with a fluted bezel and blue dial at €280, two dressy automatics, in 36 or 39 mm. In the same bracket, the Saytona chronograph at €290.
- €300 to €360: the watches with character. The octagonal S Royal at €320, the GMT Mod and its two-tone bezel at €350, the square Seitos at €360.
- Over €400: the unusual cases, the steel CasiOak and the carbon Carbone Fit.
If you are still torn between a mechanical movement and a battery, read automatic or quartz: which one to choose. And for a present, our guide to giving an automatic watch for under 300 euros does the sorting for you.
Frequently asked questions
What is the price of a Seiko mod in 2026?
At SmodParis, €270 to €360 for the steel models, and €420 to €470 for the CasiOak and the Carbone Fit. These prices include delivery in France, the presentation box and the 2-year warranty on movement and assembly.
Does a Seiko mod cost more than a production Seiko?
Not necessarily. The Seiko 5 Sports SRPD55 is listed at €320 on Seiko's French website, the middle of our range. At a similar price, the difference lies in the style, which a mod chooses freely, and in the hand assembly.
Why are some Seiko mods sold for much less?
Most often because the movement is not named, because the crystal and finishes are of a different grade, or because the watch is shipped tax-free from abroad. In that last case, 20% VAT and the carrier's fees are added on delivery.
Do you have to pay customs charges on a Seiko mod?
Not for a watch bought from a workshop based in France, such as SmodParis, and delivered in France. Yes for a parcel arriving in France from a country outside the European Union: VAT is due from the first euro, and customs duties may apply above €150.
Does the price include delivery and the warranty?
With us, yes. Delivery is free in France, within 1 to 3 weeks because each watch is assembled by hand. The warranty covers 2 years, movement and assembly, and returns are accepted within 14 days.
Sources
- Seiko France, product page for the 5 Sports SRPD55 (price, 4R36 calibre, Hardlex crystal, 42.5 mm, 10 bar), viewed on 13 October 2026: seikowatches.com
- Seiko, instruction manual for the 4R35 and 4R36 calibres, "Caractéristiques" (jewels, 21,600 vibrations, 41 hours): seikowatches.com
- Seiko, same manual, "Service après-vente" (service every 2 to 3 years): seikowatches.com
- Time Module (TMI), NH34, NH35 and NH36 mechanical calibres: timemodule.com
- French customs, "Anticiper les frais de douane d'un colis" (VAT, €150 exemption, handling fees): douane.gouv.fr
- Service-public.fr, "Garantie légale de conformité": service-public.gouv.fr
- Wikipedia (French), "Verre saphir" (hardness, spread in the 1990s): fr.wikipedia.org/wiki/Verre_saphir
- Wikipedia, "Seiko" (founded in 1881, vertical integration): en.wikipedia.org/wiki/Seiko
- SmodParis prices: product pages on 13 October 2026. Photos: SmodParis workshop.
"Seiko" and "Casio" refer to the manufacturers of the movements and modules used. SmodParis is an independent workshop, not affiliated with these brands or with any watchmaking house.