Build Your Own Watch Kit: 7 Things to Check Before You Buy

A build your own watch kit should give you every part, every tool and a clear guide, so you can finish a working automatic watch at your kitchen table in an afternoon. Below are the seven things we check before recommending any kit, including the one we make.

Short on time? See the Prodi Dive Kit, a 40mm automatic dive watch with tools included.

What should a build your own watch kit include?

A complete kit has a case, crystal, dial, hands, an automatic movement, a strap or bracelet, the tools to put them together and written steps. If you have to buy tools or parts separately, it is a parts bundle, not a kit.

Many listings called "DIY watch kit" leave something out. The most common gaps are the hand presser, the movement holder and a crown stem cut to the right length. Each one can stop a first build halfway. Use this checklist when you compare kits:

1. Movement included and named. Look for the exact caliber, such as NH35 or NH35A, not just "automatic movement".
2. Case, bezel and crystal already fitted. Pressing a crystal at home needs a crystal press most beginners do not own.
3. Dial and hands sized to the movement. NH-family dials are usually 28.5 mm with two feet that line up with the movement.
4. Bracelet or strap that fits the lugs. Check the lug width, for example 20 mm.
5. Tools in the box. At minimum a case opener, tweezers, a hand presser, a movement holder and a spring bar tool.
6. Step-by-step guide. Photos for each step matter more than a long manual.
7. Real help when you get stuck. A seller who answers a photo or video of your problem is worth more than a lower price.

How much should a watch kit cost?

Complete automatic kits with a named Seiko-family movement and tools typically start around $200 and climb with the movement and extras. A much cheaper kit usually leaves something out.

Price follows three things: the movement, the case finish and what extras come in the box. A Seiko TMI NH35A costs more than an NH35-compatible movement built to the same footprint. That is why many kits, including ours, offer both.

What you pay for	Lower end	Higher end
Movement	NH35-compatible automatic	Seiko TMI NH35A
Case	Base metal or thin steel	316L stainless steel
Tools	Screwdriver and tweezers only	Full bench kit with hand presser
Extras	None	Second dial, spare strap

Is building a watch from a kit hard?

No. With a complete kit you assemble finished parts rather than make them, and most people finish in about two hours. The only fiddly step is pressing the hands on straight.

You do not need watchmaking experience or special skill. You need a clean table, good light and patience. The work splits into four short stages: dial onto the movement, hands onto the dial, movement into the case, then close the case and fit the bracelet. If you are new to this, our guide on choosing a watch kit for beginners walks through the skills that matter.

Which movement should you choose?

For a first build, an NH35-compatible automatic is a sensible start. Choose the Japanese NH35A if you want the Seiko TMI movement for a watch you plan to keep and service.

Both run the same way: they wind as you wear them, the seconds hand stops when you pull the crown (hacking), you can wind by hand and there is a date at 3 o'clock. Seiko lists the NH35A at 24 jewels, 21,600 beats per hour and about 41 hours of power reserve. We compare them in detail in NH35 vs NH35A.

What tools do you actually need?

A case opener, plastic-tip tweezers, a hand presser, a movement holder, a blower and a spring bar tool cover a full build. A loupe helps but is optional.

• Hand presser: pushes each hand straight down onto its post without bending it.
• Movement holder: keeps the movement steady while you work on the dial side.
• Case opener: removes and tightens a screw-down case back.
• Tweezers: place hands and small parts without fingerprints.
• Spring bar tool: fits and removes the bracelet or strap.

Every Prodi kit ships with a 145-piece tool kit plus the hand presser and movement holder, so you do not buy anything else.

What happens if you get stuck?

Pick a seller that offers real help. With Prodi, you send a photo or short video of the step, and a person replies within 24 hours with the fix.

The most common slips are a hand pressed at a slight angle, a dial that is not fully seated on its feet, and a crown that does not click home. All three can be undone. A spare dial and set of hands in the box also means one mistake does not end the build.

Can you make the watch your own?

Yes. NH-family parts share a standard footprint, so you can swap the dial, hands, bezel insert or strap later without new tools.

That is what makes the NH35 popular with builders who later move on to an NH35 mod kit. Your first build teaches you every step you need for the next one.

Kit or ready-made watch: what is the difference?

A ready-made watch is finished when you buy it. A kit gives you the same kind of automatic watch plus the experience of building it and the skills to change it later.

Point	Watch kit	Ready-made watch
Time to wear	About two hours of building	Straight away
What you learn	How an automatic watch fits together	Nothing new
Changing the look	Swap dial, hands or strap yourself	Usually a jeweler's job
The story	You built it	You bought it

If the goal is simply to own a watch, buy a finished one. If you want to understand what is on your wrist and enjoy an afternoon project, a kit is the better choice.

Your pre-order checklist

Before you pay for any kit, confirm the movement name, the dial size, the lug width, the tools in the box and how support works.

• Movement: named caliber, such as NH35 or NH35A.
• Dial: 28.5 mm for NH-family dive builds, date window at 3 o'clock.
• Lug width: 20 mm is the most common and the easiest to find straps for.
• Tools: hand presser and movement holder included, not just a screwdriver.
• Spares: a second dial and set of hands, in case one gets marked.
• Support: a way to send a photo and get an answer from a person.

The bottom line

A good build your own watch kit is complete, uses a named movement, includes the right tools and comes with real help. If those four boxes are ticked, the rest is choosing a color you will enjoy wearing. Questions before you order? Write to us and we reply within 24 hours.