The world of luxury watches is filled with iconic designs, but very few timepieces have maintained their legacy as gracefully as the Rado DiaStar Original. First introduced in 1962, the DiaStar series quickly became famous for its scratch-resistant design and distinctive appearance. Over the decades, Rado has refined this collection, adding new materials, movements, and design elements while preserving its signature identity. One of the most intriguing additions to this historic lineup is the Rado DiaStar Original Open Heart Automatic Unisex Watch — a timepiece that beautifully blends tradition with contemporary watchmaking artistry.
In today’s detailed review, we explore the design, technical features, unisex appeal, and overall value of the Rado DiaStar Original Open Heart — helping you understand why this watch stands out in the modern luxury segment.
⌚ A Legacy Re-Imagined
The DiaStar range has always been known for its innovation, and the Open Heart variant takes that legacy a step further. While the original model focused on durability and a bold futuristic look, the Open Heart edition introduces a refined sense of sophistication. The partially open dial allows a clear view of the mechanical heart of the watch — a feature that appeals to both watch enthusiasts and modern luxury buyers.
This reinterpretation showcases how Rado can evolve a 60-year-old design without losing its essence. The signature faceted sapphire crystal, the oval-shaped case, and the smooth curvature remain intact, but now paired with a more modern sense of transparency and detail.
✨Design and Aesthetic Appeal
The Rado DiaStar Original Open Heart features a 35mm stainless-steel or PVD-coated case, designed intentionally to suit all wrist types. The unisex sizing makes the watch versatile — not too large for slimmer wrists and not too small for those who prefer a classic presence.
⏱️Key Design Highlights
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Open Heart Dial: A cut-out section on the dial reveals the balance wheel and mechanical movement, giving the wearer a direct view of the watch’s internal rhythm.
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Vertical Faceted Sapphire Crystal: One of the DiaStar collection’s most recognisable elements, this crystal adds light-reflecting brilliance and exceptional scratch resistance.
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Cubic Zirconia Hour Markers: Instead of traditional indexes, the watch uses finely set zirconia stones that add just the right amount of luxury without appearing flashy.
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Polished Bracelet: The metal bracelet flows smoothly onto the case, giving the watch a seamless and refined appearance suitable for both casual and professional environments.
The combination of polished surfaces, high-quality materials, and Rado’s signature finishing gives the Open Heart a distinctive look — elegant yet bold, classic yet modern.
💫Powered by a Reliable Automatic Movement
Inside the watch is Rado’s automatic calibre R764, an impressive movement designed for longevity and accuracy. One of its major features is the up to 80-hour power reserve, which allows the watch to run for more than three days when not worn — a significant upgrade compared to many standard automatic watches that offer around 40 hours.
Movement Features
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Automatic self-winding
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80-hour power reserve
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Visible balance wheel through open-heart cutout
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Smooth sweeping seconds hand
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Reliable precision for everyday wear
The pleasure of seeing the movement at work — the oscillating balance wheel and intricate mechanics — makes the watch feel more alive and personal. For anyone who appreciates traditional watchmaking, this open-heart design adds an engaging visual experience that quartz watches simply cannot offer.
💠Wearability: A True Unisex Timepiece
Unisex watches are becoming increasingly popular, and the DiaStar Open Heart is a perfect example of why. Its 35mm case hits the ideal midpoint that suits men and women alike. The design is neutral, elegant, and versatile — making it suitable for:
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Office and corporate wear
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Special occasions and events
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Smart casual outfits
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Couple watches
The lightweight feel and smooth bracelet ensure long-lasting comfort, making it a practical luxury piece for daily use.
💎Functionality and Durability
While this watch leans more towards elegance and everyday sophistication, it still carries the durability Rado is known for. The sapphire crystal is extremely scratch-resistant, and the case construction ensures long-term reliability. Its water resistance typically stands at 30 meters, which protects the watch from accidental splashes and light handwashing, though it is not recommended for swimming or heavy water exposure.
Pros and Cons
Pros
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High-end automatic movement with 80-hour reserve
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Elegant open-heart design showcasing mechanical craftsmanship
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Scratch-resistant sapphire crystal
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Unisex size suitable for all wrists
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Premium finishing and iconic DiaStar styling
Cons
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35mm size may feel small for those who prefer larger dials
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Water resistance is basic
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Open-heart style may not appeal to minimalists
💠Final Verdict
The Rado DiaStar Original Open Heart Automatic Unisex Watch is an exceptional blend of heritage, innovation, and timeless elegance. It is more than just a piece of jewellery — it is a mechanical work of art that reflects Rado’s decades-long commitment to craftsmanship and design excellence.
Whether you're a watch enthusiast who appreciates mechanical movements, a professional looking for a sophisticated accessory, or someone wanting a unisex luxury watch with a unique identity — the Open Heart edition is a compelling choice.
This watch not only tells time — it tells a story, carries a legacy, and brings a signature style that stands out in the world of modern horology.
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