What Sets It Apart
- The Rado True Square Open Heart is a 38.0 × 44.2 mm automatic watch in polished high-tech ceramic, featuring an open-heart dial set with 12 Top Wesselton diamonds and powered by Rado calibre R734 with an 80-hour power reserve — released in July 2026 to coincide with Linda Nosková’s Wimbledon victory as a Rado YoungStar ambassador.
- Two references: white ceramic (R27073722) with rose gold-coloured accents, and plasma ceramic (R27083722) with yellow gold-coloured accents.
- Calibre R734 carries Côtes de Genève decoration on the movement holder and a Nivachron™ antimagnetic hairspring adjusted in five positions.
- Water-resistant to 5 bar; monobloc ceramic construction with a sandblasted titanium case back and sapphire crystal window.
Design & Materials
The True Square Open Heart arrives as Rado marks a watershed moment for one of its most prominent tennis ambassadors. Linda Nosková, who joined the brand as a YoungStar, claimed her first Grand Slam title at Wimbledon in 2026, defeating Karolína Muchová in the final after overcoming Marta Kostyuk in the semifinals. The watch’s release and this victory arrive together.
The ceramic case is a monobloc construction, meaning no joins interrupt its continuous polished surface. White ceramic (R27073722) pairs with rose gold-coloured bevels and hands; plasma ceramic (R27083722) shifts to a darker, gun-metal tone with yellow gold accents. Both wear at 38.0 mm wide and 9.7 mm thick, which suits narrower wrists without compromising the square profile’s architectural presence.
Dial & Stone Artistry
The dial surface carries a rhodium-coloured sparkling decoration described as diamond powder-like, catching light at oblique angles. Centred within this field is the open-heart aperture, through which the escapement is visible against a silver background bearing a moving anchor symbol in the corresponding accent colour.
Twelve full-cut diamonds in a Jubilé setting ring the chapter ring, graded Top Wesselton, VS-SI, at a combined 0.096 carat. The minute track is grey-printed in relief, giving subtle depth without cluttering the view through the aperture. A flat sapphire crystal with anti-reflective coating on both faces keeps glare to a minimum.
For collectors already familiar with the True Square family, the True Square Skeleton offers a contrasting perspective on architectural case design within the same collection.
Movement & Engineering
Calibre R734 is an automatic movement with 25 jewels, running at three hands and offering 80 hours of power reserve. The movement holder is finished with Côtes de Genève stripes and circular grain decoration visible through the open-heart aperture. An antimagnetic Nivachron™ hairspring adjusted in five positions underpins long-term accuracy.
The case back is sandblasted titanium rather than ceramic, fitted with its own sapphire crystal window for a second view of the movement. The bracelet continues the monobloc ceramic theme, secured by a titanium three-fold clasp. Water resistance stands at 5 bar, equivalent to 50 metres.
Rado has built its material identity on high-tech ceramic since the early 1990s. The Captain Cook High-Tech Ceramic Chronograph illustrates how the brand applies the same material across very different aesthetic briefs.
Adrian Bosshard, CEO of Rado, stated: “We are extremely proud of Linda and this remarkable milestone in her career. Her first Wimbledon title is the result of years of dedication, perseverance and hard work. Since joining the Rado YoungStar family, she has consistently embodied the passion, determination and pursuit of excellence that define champions.”
Specifications at a Glance
| Specification | Detail |
|---|---|
| Movement | Rado calibre R734, automatic, 25 jewels, 80-hour power reserve, Nivachron™ hairspring, 5-position adjustment |
| Case Size | 38.0 × 44.2 × 9.7 mm (W × L × H) |
| Case Material | Polished white high-tech ceramic (R27073722) / Polished plasma high-tech ceramic (R27083722), monobloc construction |
| Water Resistance | 5 bar (50 metres) |
| References | R27073722 (white ceramic), R27083722 (plasma ceramic) |
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| Movement | Rado calibre R734, automatic, 25 jewels, 3 hands, open heart, Côtes de Genève decoration, 80-hour power reserve, antimagnetic Nivachron™ hairspring, adjusted in 5 positions |
| Case size | 38.0 × 44.2 × 9.7 mm (W × L × H) |
| Case material | R27073722: polished white high-tech ceramic, monobloc construction, sandblasted titanium case back with sapphire crystal. R27083722: polished plasma high-tech ceramic, monobloc construction, sandblasted titanium case back with sapphire crystal |
| Water resistance | 5 bar (50 metres) |
| Price | Not stated |
Frequently Asked Questions
What movement does the Rado True Square Open Heart use?
The True Square Open Heart runs on Rado calibre R734, an automatic movement with 25 jewels, a 3-hand display and an 80-hour power reserve. It features an antimagnetic Nivachron™ hairspring adjusted in five positions, and the movement is finished with circular grain decoration and Côtes de Genève on the holder.
What are the case dimensions and material of the Rado True Square Open Heart?
The case measures 38.0 × 44.2 × 9.7 mm and is offered in two high-tech ceramic variants: polished white ceramic (ref. R27073722) and polished plasma ceramic (ref. R27083722). Both use monobloc construction with a sandblasted titanium case back fitted with a sapphire crystal.
Is the Rado True Square Open Heart water-resistant?
The watch is water-resistant to 5 bar, equivalent to 50 metres, making it suitable for everyday wear.
Why is the Rado True Square Open Heart associated with Linda Nosková?
Linda Nosková is a Rado YoungStar ambassador who won her first Grand Slam title at Wimbledon in 2026. Rado released coverage of the True Square Open Heart in conjunction with celebrating her victory, reflecting the brand's more than 40-year partnership with professional tennis.
How many diamonds are set on the Rado True Square Open Heart dial?
Both references feature 12 diamonds on a Jubilé setting: Top Wesselton, VS-SI quality, full cut, with a combined weight of 0.096 carat.
