How Does a Skeleton Watch Work? The Open Dial Fully Explained
If you've ever looked at a watch and wondered what's happening inside, a skeleton watch answers that question permanently and visually. By removing material from the movement's bridges, plates, and baseplate — and opening the dial — a skeleton timepiece turns the engine of timekeeping into the centrepiece of the design.
What Does "Skeletonised" Actually Mean?
In traditional watchmaking, the movement sits behind a solid dial — the mechanical components hidden from view, the dial surface presenting only hands and hour markers. Skeletonisation is the process of removing material from the movement's structural components — bridges, main plates, barrel bridge — while maintaining the structural integrity required for the movement to function accurately. What's left is a lattice of metal through which the moving parts are clearly visible.
The dial itself is either removed entirely or opened with large apertures, and sapphire crystal seals the case while allowing an unobstructed view of the movement from both sides.
What Can You See Inside a Skeleton Watch?
- Mainspring barrel — the coiled metal spring that stores energy. The watch's power source.
- Gear train — the series of interconnecting wheels that transmit energy from the barrel to the escapement.
- Escapement — the pallet fork and escape wheel that regulate the release of energy, producing the watch's characteristic tick.
- Balance wheel — the oscillating wheel that divides time, swinging back and forth several times per second.
- Hairspring — the ultra-fine coiled spring governing the balance wheel's oscillation rate.
- Rotor (automatic models) — the semicircular weight that winds the mainspring through wrist movement.
Every component visible is in motion during operation. The balance wheel oscillates 6 times per second in the NH35A. The rotor sweeps when your wrist moves. The gear train turns constantly. It is a live mechanical performance on your wrist.
What Is the Difference Between Skeleton and Open Heart?
An open heart watch has a small aperture cut into the dial revealing only the balance wheel — a partial glimpse. A full skeleton watch removes material from the entire dial and movement, offering an unobstructed view of the complete mechanical system. PINDU's Skeleton & Open Dial collection features fully skeletonised movements — the complete engine on display.
How Is a Skeleton Movement Made?
Traditional Swiss watchmaking skeletonises movements by hand — craftsmen spend days carefully cutting, filing, and bevelling each component. Modern precision CNC machining achieves comparable results with greater consistency, making skeleton watches genuinely accessible at a range of price points.
PINDU Skeleton Watches
- P6552 Coloured Diamond Skeleton ($199.99) — Multicolour diamond bezel, fully open NH35A movement on navy rubber strap. PINDU's most-reviewed skeleton model.
- P6618 Skeleton Rotating Dial ($269.99) — Open NH35A movement with a rotating outer ring dial element.
- P6655 Godfather Classic Skeleton ($299.99) — Clean skeleton automatic on leather strap. The most refined PINDU skeleton.
Frequently Asked Questions
Is a skeleton watch more fragile than a regular watch?
Not necessarily. Skeletonisation removes decorative material but maintains the structural bridges and plates required for movement integrity. A skeleton watch with a sealed case and sapphire crystal is as durable in daily wear as a conventional watch.
Can you see the movement on both sides of a skeleton watch?
Many skeleton watches feature sapphire crystal on both the front dial and the caseback. PINDU's PD6568 Square Tourbillon and P6552 Diamond Skeleton both feature front and back exhibition displays.
Do skeleton watches keep accurate time?
Yes. Skeletonisation is a design process — it does not affect the movement's timekeeping. PINDU's skeleton models use the NH35A movement, rated at −20 to +40 seconds per day, with most units running within ±10–15 seconds per day in real-world wear.