Orient Star Open Heart Blue Gradation Mother of Pearl Sapphire Crystal Watch RE-BY0004A

Items Description

The Orient Star Open Heart Blue Gradation Mother of Pearl Sapphire Crystal Watch RE-BY0004A is an automatic dress watch that showcases a blue gradation mother-of-pearl dial inspired by the shifting shades of the aurora borealis. This timepiece from the Orient Star M34 collection is designed for discerning wearers who value traditional Japanese mechanical watchmaking combined with a distinctive, nature-inspired aesthetic. The open heart complication at 9 o'clock reveals the balance wheel in motion, adding a layer of visual intrigue to an already captivating dial.

 

The watch functions as a refined everyday automatic timepiece that pairs a precise in-house movement with a rarely seen dial material. Mother-of-pearl, known for its iridescent quality, is here treated with a blue gradation finish that deepens toward the edges, echoing the nocturnal spectacle of polar skies. Protected beneath a scratch-resistant sapphire crystal, the dial offers both durability and a window into the mechanical craftsmanship that defines the Orient Star lineage.

 

Key Advantages of the Orient Star Open Heart Blue Gradation Mother of Pearl Sapphire Crystal Watch RE-BY0004A

 

1. Captivating Aurora-Inspired Dial Craftsmanship

The defining feature of the RE-BY0004A is its blue gradation mother-of-pearl dial, a material that presents a unique play of light with every wrist movement. Unlike printed or painted dials, each mother-of-pearl piece carries its own natural striations, meaning no two watches are exactly alike.

 

• Natural Iridescence: The dial shifts between deep blues and subtle greens depending on the lighting angle, mirroring the aurora effect.
• Gradation Depth: The colour transitions from a lighter centre to a darker peripheral tone, creating a sense of dimension rarely found at this price point.
• Individual Character: Natural shell material ensures the pattern on every watch is unique, offering a degree of personalisation typically reserved for far more expensive pieces.

 

2. Open Heart Complication for Mechanical Appreciation

At 9 o'clock, an aperture reveals the oscillating balance wheel, offering a continuous view of the movement at work. This open heart design connects the wearer to the mechanical heartbeat of the watch, making it a focal point for those who value horological detail.

 

• Movement Visibility: The cut-out exposes the balance cock and regulating keys, providing insight into the calibre's construction.
• Visual Asymmetry: The open heart is balanced by a small seconds sub-dial, maintaining a harmonious dial layout that avoids clutter.
• Conversation Piece: The moving balance wheel adds a dynamic element static quartz watches simply cannot offer.

 

3. Reliable Automatic Calibre with 50-Hour Reserve

Powering the RE-BY0004A is an Orient Star in-house automatic movement, the F6B22, which delivers dependable accuracy and practical performance for daily rotation. The movement can also be hand-wound, offering flexibility when the watch has not been worn for a day or two.

 

• Power Reserve: A full wind provides up to 50 hours of operation, easily covering a weekend away from the wrist.
• Frequency: The balance beats at 21,600 vibrations per hour (3 Hz), a smooth sweep that aligns with classic watchmaking conventions.
• Hand-Winding: The crown allows manual winding to quickly restart the movement when it has fully stopped.

 

4. Sapphire Crystal and Premium Build Quality

The watch face is shielded by a sapphire crystal, a material chosen for its exceptional scratch resistance, ensuring the aurora dial remains pristine over years of wear. The case itself is crafted from stainless steel and features a combination of polished and brushed surfaces that catch light elegantly.

 

• Sapphire Protection: Rates 9 on the Mohs scale, effectively resisting scratches from everyday contact.
• Dual-Curve Profile: The crystal features an anti-reflective coating to maintain dial clarity in bright conditions.
• Exhibition Caseback: A separate sapphire window on the reverse side showcases the decorated rotor and movement finishing, including the signature Orient Star lion emblem.

 

5. Distinctive M34 Collection Design Language

The RE-BY0004A belongs to the Orient Star M34 series, a family recognised for its two-piece case construction and sharp, contemporary lugs that improve wrist presence. At 39.3mm in diameter, the case diameter sits in a versatile middle ground, suited to both formal attire and smart-casual outfits.

 

• Case Dimensions: The 39.3mm width and 12.6mm height allow it to slip easily under a shirt cuff without feeling bulky.
• Sculpted Lugs: A faceted design creates the appearance of separate upper and lower case parts, a signature of the M34 line.
• Crown Guard: The signed, non-screw-down crown offers 50 metres of water resistance, adequate for hand washing and light rain.

 

The Orient Star RE-BY0004A is best suited for watch enthusiasts and first-time mechanical buyers alike who want an accessible yet characterful entry point into Japanese automatic watchmaking. For those who favour a dial that changes with the light and a movement that rewards close inspection, this blue gradation mother-of-pearl model offers a level of visual richness that standard production watches rarely achieve.

Specifications of Orient Star Open Heart Blue Gradation Mother of Pearl Sapphire Crystal Watch RE-BY0004A

Model number	RE-BY0004A
Band Color	Silver
Dial color	Blue
Display	Analog
Watch Movement Type	Japanese Automatic
Additional Features	Open Heart
Strap Type	Bracelet
Water Resistance Depth	100 meters
Sport Type	Walking
Clasp Type	Push Button Foldover Clasp With Safety
Water Resistance Level	Water Resistant
Closure Type	Push-Button
Style Name	Dress Watch
Face Style	Skeleton

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Specifications
[Model number ]	RE-BY0004A
[Band Color ]	Silver
[Dial color ]	Blue
[Display]	Analog
[Watch Movement Type]	Japanese Automatic
[Additional Features]	Open Heart
[Strap Type]	Bracelet
[Water Resistance Depth]	100 meters
[Sport Type]	Walking
[Clasp Type]	Push Button Foldover Clasp With Safety
[Water Resistance Level]	Water Resistant
[Closure Type]	Push-Button
[Style Name]	Dress Watch
[Face Style]	Skeleton

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