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- Bonetto Cinturini 306 Rubber Watch Strap - Black
Bonetto Cinturini 306 Rubber Watch Strap - Black
Made in Italy from vulcanized NBR rubber. Waterproof, UV-resistant, and nonallergenic.
Model 306 takes a more restrained approach than Bonetto’s traditional dive designs. It features a smooth, streamlined profile with gently beveled edges and minimal surface detailing, giving it a cleaner, more contemporary look on the wrist. The evenly spaced adjustment holes keep the appearance simple and balanced rather than overtly sporty. This is one of the most understated rubber straps in the Bonetto range. It works especially well on modern tool watches and everyday sports watches where you want the durability of rubber without heavy dive-strap styling or visual bulk.
Material & feel
This 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 maintaining controlled flexibility, allowing the strap to bend naturally without feeling soft or unstable.
Compared to Bonetto’s wave and ladder styles, Model 306 feels smoother and more uniform on the wrist. The beveled edges reduce visual and physical bulk, giving the strap a comfortable, low-profile feel that sits cleanly against the wrist. The matte surface resists lint and dust more effectively than many silicone straps and maintains a tidy, modern appearance.
Carries a light vanilla scent, typical of Italian-made vulcanized rubber.
Sizing & specs Length, taper, spring bars, buckle finish and more
Length:
125mm / 75mm (fits wrists 7.0–7.75in)
Taper:
- 20mm lug / 18mm buckle
Fit guidance
Model 306 has a smooth surface and beveled edges that help it wear flatter and slimmer than more heavily sculpted dive straps. Accommodates spring bars up to 1.5mm in diameter.
Popular watch pairings
20mm strap width fits:
- Hamilton Khaki Field
- Omega Seamaster Diver 300M
- Omega Speedmaster Professional
- Oris Big Crown Pointer Date 40mm
- 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.
