Orient Star RE-AZ0004S00B M45 Skeleton – Hand-Wound Mechanical Watch
 
The Orient Star RE-AZ0004S00B is a highly refined mechanical timepiece from the M45 collection, combining traditional skeleton watchmaking with modern Japanese engineering. Featuring a partially openworked dial and hand-wound movement, this model focuses on precision, craftsmanship, and mechanical purity.
 
With its slim profile, architectural movement design, and long power reserve, it offers a completely different experience compared to standard automatic models.
 
Skeleton Dial – Balanced Mechanical Exposure
The RE-AZ0004S00B features a structured skeleton dial, designed to reveal key elements of the movement while maintaining clarity and balance.
Partially openworked dial with visible movement components
Power reserve indicator
Small seconds display
Clean, symmetrical layout for strong legibility
Unlike full skeleton designs, this layout keeps the watch refined while still showcasing its mechanical complexity.
 
Precision Skeleton Construction
This model uses a carefully engineered movement-first design, where the dial and movement are integrated into a single visual structure.
The construction includes:
A partially skeletonised movement architecture, allowing visibility of key components
Precision finishing of bridges and plates for a clean, high-end appearance
Design elements inspired by astronomical themes, including curved shapes and layered depth
Careful layout to ensure balance between visibility and readability
This approach gives the watch a technical yet refined feel, rather than an overly exposed skeleton look.
 
In-House Hand-Wound Movement – Calibre F8B62
At the heart of the RE-AZ0004S00B is the Orient Star Calibre F8B62, a high-grade in-house hand-wound movement:
Manual winding (hand-wound)
Power reserve: approx. 70 hours
Frequency: 21,600 vibrations per hour (3Hz)
22 jewels
This movement is designed for enthusiasts who enjoy a more interactive mechanical experience, with a longer power reserve than most automatic alternatives.
 
Case, Crystal & Build Quality
The RE-AZ0004S00B is designed with refined proportions and premium materials:
Case diameter: 38.8 mm
Case thickness: approx. 10.6–10.8 mm
Case material: Stainless steel
Crystal: Sapphire with anti-reflective coating
Caseback: Exhibition (see-through)
Water resistance: 50 m (5 bar)
The slim case profile makes it particularly comfortable and versatile on the wrist.
 
Strap & Wearability
Strap: Brown cordovan leather
Lug width: 20 mm
Clasp: Deployant clasp
The high-quality leather strap complements the watch’s refined aesthetic while maintaining durability.
 
Key Specifications
Model: Orient Star RE-AZ0004S00B
Collection: M45 Skeleton
Movement: In-house Calibre F8B62 (Manual / hand-wound)
Power Reserve: ~70 hours
Jewels: 22
Dial: Skeletonised (champagne tone)
Functions: Hours, minutes, small seconds, power reserve indicator
Crystal: Sapphire (anti-reflective)
Case Material: Stainless steel
Case Size: 38.8 mm / ~10.6–10.8 mm thickness
Lug Width: 20 mm
Strap: Brown cordovan leather
Water Resistance: 50 m (5 bar)