Most skeleton watches show you the movement in full — every bridge, every wheel, the entire gear train exposed across the dial. The open heart watch for men takes a more focused approach: a single aperture cut into the dial at a specific point, framing one element of the movement in isolation. The effect is restrained and intentional — less about display, more about revelation. The PINDU P6668 Wave Dial Watch builds on this concept with a flowing organic dial pattern that surrounds the open-heart aperture, so the movement you see is framed by art rather than emptiness.
Open Heart vs Full Skeleton: What's the Actual Difference?
An open heart watch differs from a full skeleton in scope, not in principle. Both expose the movement through the dial. A fully skeletonised watch removes as much dial material as possible — you can often see through the watch from front to back. An open heart watch preserves the dial surface almost entirely, cutting a single shaped window — typically at 9 o'clock over the oscillating balance wheel — that draws the eye to one moment in the mechanical sequence.
The practical result is a more wearable daily piece. A full skeleton dial is visually busy at any distance — the movement competes with the hands for attention, and in certain lighting readability suffers. An open-dial watch maintains legibility while offering one compelling window into the mechanism below. According to Hodinkee's guide to movement complications, the balance wheel typically oscillates between 21,600 and 28,800 times per hour in a standard automatic movement — the rhythm you see through every open heart aperture.
For a comparison of the open-dial and full-skeleton approaches, see our skeleton watch guide and the P6618 vs P6668 comparison.
The P6668 Wave Dial: What Makes This One Different
The PINDU P6668 Wave Dial Watch takes the open heart format and surrounds it with a dial pattern designed to complement the exposed movement rather than simply frame it. The flowing wave motif — rendered in the dial material itself, not applied as a print — creates the impression of motion across the entire face. When the movement's balance wheel oscillates through the aperture, the kinetic energy of the mechanism echoes what the dial is already suggesting visually.
This is a watch with visible movement in the truest sense — not just technically but aesthetically. The automatic movement winds from your wrist throughout the day, so the balance wheel through the aperture is in constant motion during wear. The wave pattern surrounding it amplifies that reading. The stainless steel case carries a bracelet that continues the linear pattern language of the dial, and the sapphire crystal sits above the aperture providing scratch resistance across the most-viewed surface of the watch.
How the P6668 Fits Into the PINDU Skeleton Collection
The skeleton dial watch category within PINDU covers two distinct positions. The P6618 Skeleton Rotating Dial takes the full-skeleton approach — the movement is the dial, with an additional rotating mechanism adding a layer of visible action. The P6668 takes the opposite approach — the dial is complete in itself, and the open aperture is a deliberate editorial decision, not a structural necessity.
Both models sit within PINDU's Skeleton & Open Dial collection. The distinction matters when choosing: if maximum mechanical visibility is the goal, the P6618 is the answer. If a complete, designed dial with one revealing window is the goal, the P6668 is the answer. The open heart automatic watch format tends to attract buyers who appreciate watchmaking craft but prefer their watches to read as designed objects first.
Frequently Asked Questions
What is an open heart watch for men?
An open heart watch features a single aperture cut into the dial surface that reveals a specific part of the mechanical movement — typically the oscillating balance wheel. Unlike a full skeleton watch, an open heart preserves the dial while adding one carefully placed window into the mechanism. The PINDU P6668 uses this format alongside a flowing wave-pattern dial.
Is an open heart watch the same as a skeleton watch?
No — though both expose the movement, they do so differently. A skeleton watch removes the majority of the dial to expose the full gear train. An open heart watch keeps the dial mostly intact but creates one framed aperture over a specific movement component. The P6668 is an open heart; the P6618 is a full skeleton with a rotating mechanism.
What movement is visible through an open heart dial?
In most open heart watches, including the P6668, the aperture frames the oscillating balance wheel — the component that regulates energy release through the escapement. The balance wheel rocks back and forth multiple times per second, giving the watch constant visible motion through the aperture.
Can you wear an open heart watch daily?
Yes. The P6668's aperture is protected by sapphire crystal, which covers both the printed dial and the aperture equally. The movement beneath is no more exposed to dust or moisture than in a standard closed-dial watch of equivalent water resistance. PINDU's 3-year warranty covers movement defects on all models.
The PINDU P6668 Wave Dial Watch is the collection's most artistically complete open heart watch for men — a flowing wave-pattern dial that gives context and motion to the aperture above the balance wheel, backed by automatic movement, sapphire crystal, and a 3-year warranty. Every order ships tracked with official PINDU documentation. Explore the full open-dial range in the Skeleton & Open Dial collection.