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Watches · Builds · Stories

Watch mods & horology, from the bench.

Builds, teardowns and the slow business of learning how a movement actually works. Filmed up close. The mistakes stay in.

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The build board

Builds & concepts

One finished, more on the way. Concepts stay on the board until the parts arrive and they make it onto the bench.

The finished orange field watch lying on a tan leather mat: sunburst orange dial signed Arka, applied silver indices, a numbered minute track, date at six, a grey bead-blasted case and an orange textured strap
Built

Orange field

Sunburst orange dial signed अRka, faceted applied indices, a numbered minute track and date at six, in a bead‑blasted case on a textured orange strap.

Concept render: a steel sports watch with a blue wave-textured dial, an open-heart window at nine and a 24-hour sub-dial, on a blue canvas strap with orange stitching
Concept

Open-heart blue

Wave-textured dial, the balance on show at nine, a 24-hour sub-dial.

Render: the orange field watch styled on a leather notebook beside a brass compass and a pen
Render

Orange field, styled

The finished build, imagined on the explorer's desk it was designed for.

A watch movement mid-teardown on a tan leather bench mat: rotor, bridges, wheels, hands and screws sorted into a blue parts tray, the movement in its holder with the stem and crown still fitted

Not a render

This one's real.

An NH‑series automatic, halfway through a teardown. The decorated rotor, the bridges, train wheels, hands and screws each have their own compartment in the tray; the movement waits in its holder with the stem still in.

That is what the channel is about. Every part gets taken out, named, and put back — and by the end you know what it does and why it's there.

  • Rotor winds the mainspring as your wrist moves
  • Bridges hold the wheels' top pivots in place
  • Train wheels carry the power to the escapement
  • Balance the timekeeper, on its own bridge

Horology, in small pieces

How a movement works

From your first mod to a grand complication, it's the same five systems in a row. Learn these and every teardown starts to make sense.

  1. 01 · Power

    Mainspring

    A coiled spring in the barrel. The crown, or the rotor, winds it; everything else runs on it slowly letting go.

  2. 02 · Transmission

    Gear train

    Centre, third, fourth and escape wheels step the energy down. The fourth usually turns once a minute — so the seconds hand sits on it.

  3. 03 · Distribution

    Escapement

    Escape wheel and pallet fork release the train one tooth at a time and nudge the balance each time. That release is the tick.

  4. 04 · Regulation

    Balance

    Wheel and hairspring swing at a fixed rate; each swing lets the escapement advance once. Regulating a watch means adjusting this.

  5. 05 · Indication

    Motion works

    Cannon pinion, minute wheel and hour wheel gear the minute hand down to the hour hand at 12 : 1.

TIME ELEVATED
--:--:-- 6 beats a second, like an NH35 at 21,600 vph

What "vph" means

Vibrations per hour — how often the balance swings. The seconds hand moves once per swing, so you can see the beat rate. Watch the dial and switch between them.

18,000
2.5 Hz · 5 beats/s · common in vintage
21,600
3 Hz · 6 beats/s · the NH35, most mods
28,800
4 Hz · 8 beats/s · most modern Swiss

Seiko NH35A at a glance

Type
automatic · hand‑winding · hacking
Jewels
24
Power reserve
≈ 41 hours
Size
Ø 27.4 mm · 5.32 mm
Hand holes
1.50 · 0.90 · 0.20 mm
Accuracy
−20 to +40 s/day rated

Starter bench kit

  • Case-back opener — friction ball for screw-downs, knife for snap-backs
  • Movement holder — so it never rests on its stem
  • Hand presses & levers — with a dial protector sheet
  • Tweezers — brass or plastic near dials, steel for screws
  • Rodico — putty that lifts dust and fingerprints
  • Blower, finger cots, 3–5× loupe — and good light
The Arka badge: the gold wordmark over a close-up of a balance wheel, ringed in gold

अर्क · arka · Sanskrit

Why Arka

Arka is Sanskrit for the sun — for most of history, the only clock anyone owned. In the old word‑numerals, where numbers were written as things, the sun also stands for twelve: one Āditya for each month.

Twelve is where every dial begins, which is why the wordmark sits at twelve on the dial above. The अ standing in for the A lets the name read in both scripts at once.