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Bonetto Cinturini 307 Black Rubber Watch Strap | Holben's
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Bonetto Cinturini 307 Rubber Watch Strap - Black

Made in Italy from vulcanized NBR rubber. Waterproof, UV-resistant, and nonallergenic.

More from Bonetto Cinturini
$45.00
Unsure about fit? Find your strap size
Strap width:20mm
Ships same or next business day  • Free U.S. shipping over $49  • Easy 60-day returns

Model 307 draws from the waffle-pattern rubber straps associated with early dive watches and vintage sports models. The raised grid texture gives the strap a distinctly retro dive-watch character without the oversized sculpting or heavy wave patterns common to many modern rubber straps. Its restrained profile works especially well on vintage-inspired divers and smaller sports watches where thicker contemporary dive straps can feel overly aggressive.

Material & feel

The strap is made from vulcanized nitrile butadiene rubber (NBR), selected for its durability, flexibility, and resistance to seawater and sunlight. The vulcanization process strengthens the material while preserving a soft, supple feel, allowing the strap to flex easily and sit comfortably on the wrist.

The waffle texture adds grip and subtle cushioning, while the matte finish helps resist lint and dust and maintains a classic, understated appearance.

Carries a light vanilla scent, typical of Italian-made vulcanized rubber.

Sizing & specs Length, taper, spring bars, buckle finish and more

Length:

125mm / 78mm (fits wrists 6.75–7.75in)

Measurements exclude the buckle.

Taper:

  • 20mm lug / 18mm buckle
Spring bars:
Standard (free pair included)
Buckle:
Polished stainless steel
Thickness:
2.5mm
Sheen:
Matte
Fit guidance

Model 307 accommodates spring bars up to 1.5mm in diameter.

Popular watch pairings

20mm strap width fits:

  • Glycine Combat Sub 39
  • Hamilton Khaki Field
  • Omega Seamaster Diver 300M
  • Omega Speedmaster Professional
  • Rolex Submariner
  • Sinn 104
Wear & care

Swim ready, suitable for swimming and regular water exposure.

Clean with lukewarm water and mild soap as needed. Rinse thoroughly and allow to air dry fully. Avoid solvents, abrasives and petroleum-based cleaners.

About the brand

Bonetto Cinturini is an Italian manufacturer with more than forty years of experience producing rubber watch straps for professional and everyday use. The brand specializes in straps made from vulcanized nitrile butadiene rubber, selected for its durability, flexibility, and resistance to seawater and UV exposure.

Bonetto Cinturini straps are widely used by watch manufacturers and enthusiasts who value long-term performance, comfort, and straightforward, functional design.

Shipping

Orders placed by 2:00pm PST on business days typically ship the same day.

Tracking is included with every order and emailed at shipment.

United States

  • USPS Ground Advantage: free on orders over $49, or $5.95 on orders up to $49. 3 to 6 business days.
  • USPS Priority Mail: $9.95. 2 to 4 business days.
  • USPS Priority Mail Express: $25.95. 1 to 3 business days.

International

  • USPS First Class International: $17.95. 10 to 21 business days.

For complete shipping details, see our Shipping Policy.

Returns & exchanges

Unused items may be returned or exchanged within 60 days of purchase.

Please contact us before sending an exchange.

For full return details and instructions, see our Returns Policy.

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