What Is a Chronograph Watch? The Complete Plain-English Guide

You've Seen It. Now Here's What It Actually Is.

Those extra dials on the watch face. The pushers on the side of the case. The word on the dial you've seen a hundred times and maybe never stopped to look up. Chronograph. It's one of the most common words in watch retail and one of the least explained.

This is the complete answer. What a chronograph is, how it works, what the sub-dials do, and whether you actually need one. Plus the Tomell London chronograph range built to the standard the word deserves.

What Is a Chronograph Watch?

A chronograph is a watch with a built-in stopwatch function. The word comes from the Greek: chronos (time) and graphe (writing). Literally a recorder of time.

The basic function: press the pusher at 2 o'clock to start timing. Press again to stop. Press the pusher at 4 o'clock to reset. The central seconds hand sweeps the main dial face while timing. The sub-dials record minutes and hours elapsed. That's the mechanism in its most fundamental form.

Chronographs were originally built for pilots, racing drivers, and military use any situation where precise elapsed-time measurement was critical. Today they're worn by men who appreciate the engineering and the visual complexity the function adds to a dial.

What Are the Sub-Dials?

A standard chronograph has two or three sub-dials the smaller circles within the main dial face. Here's what each one does:

  • Running seconds: The sub-dial that moves constantly while the watch is running. Usually positioned at 9 o'clock.
  • Chronograph minutes: Records elapsed minutes when the chronograph is running. Usually at 3 o'clock or 12 o'clock.
  • Chronograph hours: Records elapsed hours. Usually at 6 o'clock.

The visual effect of sub-dials is as important as their function. A dial with properly balanced sub-dials reads as more complex, more considered, and more interesting than a single-hand dial.

What Is a Tachymeter?

Many chronograph watches include a tachymeter scale on the bezel. The tachymeter allows you to calculate speed over a known distance using the chronograph function. Start the timer when you begin a kilometre, stop it when you finish, and read your speed directly from the scale where the seconds hand points.

Do You Actually Need a Chronograph?

Probably not for the stopwatch function. Almost certainly yes for what it adds to the watch aesthetically. A chronograph dial is simply more interesting than a time-only dial. The sub-dials create visual depth. The pushers add architectural interest to the case profile. The tachymeter bezel frames the dial with intention.

The Tomell London Chronograph Range

PILOT APEX-22 — £165

The purest chronograph in the range. Black dial. White sub-dials. Tachymeter bezel. Aviation-inspired, built clean, and wears with everything from flight jackets to business casual. At £165 with sapphire crystal and 316L steel, the best-value serious chronograph in the UK.
→ Shop PILOT APEX-22 — £165

Tokyo Blue — £165

Blue dial. Rose gold case. Chronograph sub-dials. The chronograph for spring and summer — colour and function in one piece.
→ Shop Tokyo Blue — £165

Tokyo Brown — £165

Brown leather strap. Rose gold case. Warm brown dial. The chronograph for the man who wants function with character.
→ Shop Tokyo Brown — £165

Prestige Chronos Verde — £280

Green dial. Gold case. Tachymeter bezel. The motorsport-inspired chronograph with the most visual authority.
→ Shop Prestige Chronos Verde — £280

Silver Blue Motorsport — £310

Silver case. Blue racing dial. Tachymeter. The most refined chronograph in the range.
→ Shop Silver Blue Motorsport — £310

The Tomell Chronograph Standard

Every Tomell chronograph: 316L stainless steel, sapphire crystal glass, built for daily wear. Free UK delivery. Packed personally by Tomas. Handwritten note in every order.

→ Browse the full chronograph range at tomellwatches.co.uk

Further Reading

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