This replica ballon bleu bb0009 brings the Ballon Bleu de Cartier’s spherical case design to a leather strap configuration, offering a different wrist feel compared to the metal bracelet versions that dominate the collection. The W4BB0009 keeps the hallmark features intact: the rounded case that curves inward at both edges, the protected crown integrated into the case flank, and the Roman numeral dial layout. The leather strap adds a dressier, slimmer profile on the wrist, making this version better suited to formal settings than bracelet alternatives.

Build Details

• Case shape: round with convex profile
• Case material: stainless steel
• Dial: silver guilloché with painted Roman numerals
• Crystal: sapphire with cabochon-set crown guard
• Crown: protected within case contour at 3 o’clock
• Strap: leather with deployment buckle
• Movement: automatic
• Functions: hours, minutes, seconds, date

The crown integration is the Ballon Bleu’s defining technical detail. Rather than protruding from the case side, the crown sits recessed at 3 o’clock, covered by a cabochon-topped guard that follows the case curvature. This eliminates the crown digging into the back of your hand during wear.

What Collectors Notice

Leather strap Ballon Bleu references attract buyers who already own a bracelet watch and want something lighter for rotation. The W4BB0009 weighs noticeably less than its bracelet equivalent, and the strap conforms to wrist shape faster than steel links. The guilloché pattern on the dial catches light in a radial sunburst that works under both warm and cool lighting. The full Ballon Bleu collection includes rose gold, two-tone, and diamond-set variants. For a rose gold version on leather, the Ballon Bleu WGBB0030 adds warm metal tones while keeping the same case architecture.

This vs Other Versions

The strap version trades some of the integrated-bracelet look for versatility. You can swap the leather for different colors or textures to match clothing, something a fixed bracelet does not allow. Case dimensions remain identical to the bracelet model, so the spherical silhouette is preserved regardless of what sits underneath. For daily wear where a metal bracelet might feel too heavy, the leather configuration provides a sensible middle ground. This replica ballon bleu bb0009 offers the full Ballon Bleu experience in a format that prioritizes comfort and formality over the heft of steel links.

Cartier Ballon Bleu W4BB0009: Technical Specifications

• Reference: W4BB0009
• Case Diameter: 28mm
• Case Thickness: 9.35mm
• Case Material: 316L Stainless Steel
• Bezel: Fixed polished steel
• Dial: Silver guilloché with Roman numerals
• Hands: Blued steel sword-shaped
• Crown: Fluted with blue synthetic spinel
• Crystal: Sapphire glass
• Movement: Swiss quartz
• Strap: Black alligator leather with deployment
• Lug Width: 14mm
• Water Resistance: 30 meters

Authentic vs Replica: W4BB0009 Value

Genuine Cartier Ballon Bleu W4BB0009: $4,800 MSRP
Quality Replica: $430

The 28mm W4BB0009 on black leather strap combines petite sizing with classic strap elegance. Leather adds warmth and reduces weight compared to bracelet versions. This is the formal-occasion 28mm Ballon Bleu — perfect for evening wear and dressy events.

28mm Strap Options

For bracelet version, see WSBB0067. Compare pink dial at W6920033. For colored strap at 33mm, explore blue WJBB0076. Browse all Ballon Bleu.