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- Bonetto Cinturini 300D Rubber Watch Strap - Black
Bonetto Cinturini 300D Rubber Watch Strap - Black
Double Face construction. Italian-made NBR rubber. Steel deployant clasp.
Model 300D is the textured side of Bonetto Cinturini’s Double Face 300 series. One side carries a fine geometric texture, while the reverse (300L) is smooth. The strap can be flipped by removing the spring bars, giving two distinct looks in one design.
The strap uses a deployant clasp rather than a traditional buckle, creating a clean, continuous profile with no loose tail. The brushed steel clasp with polished safety lock adds structure and keeps the look balanced on the wrist.
Material & feel
Made from vulcanized NBR rubber, the strap has a firm, dense feel with controlled flexibility. At 4mm thick, it carries more presence than slimmer rubber straps but remains comfortable once shaped to the wrist. The textured side adds visual depth, while the smooth reverse offers a simpler, flatter look against the case.
Carries a light vanilla scent, typical of Italian-made vulcanized rubber.
Learn more in our Rubber Watch Strap Guide.
Sizing & specs Length, taper, spring bars, buckle finish and more
Taper:
- 18mm lug / 18mm buckle
- 20mm lug / 18mm buckle
- 22mm lug / 20mm buckle
- 24mm lug / 20mm buckle
Fit guidance
Fit is adjusted by trimming the strap at the clasp end using the pre-set pinholes. Because there is no traditional tail, proper sizing depends on trimming and clasp alignment. Accommodates spring bars up to 1.5mm in diameter. For step-by-step cutting instructions, see our Bonetto Cinturini sizing guide.
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
- Tudor Black Bay Fifty-Eight
22mm strap width fits:
- Orient Kamasu
- Orient Ray II
- Tudor Black Bay
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 $59, or $6.95 on orders up to $59. 3 to 6 business days.
- USPS Priority Mail: $11.95. 2 to 4 business days.
- USPS Priority Mail Express: $28.95. 1 to 3 business days.
International
- USPS First Class International: $18.95. 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.
- 5 stars: 225 (84%)
- 4 stars: 31 (12%)
- 3 stars: 6 (2%)
- 2 stars: 5 (2%)
- 1 star: 1 (0%)
While the 300D is a bit beefy, it’s not so thick that it overwhelms smaller dive watches. The rubber is less flexible than I had hoped but definitely has a solid premium feel (nice smell, too!) and is both comfy and durable.
Cutting to fit is much easier than I feared. Just make sure to follow Holben’s guide and you’ll be fine. Pictured on a 39mm watch worn on 7”/17.8cm wrist.
Ordered this to replace the bulky oem strap for my Panerai submersible, and what a difference. So much more refined and comfortable. I was initially worried about the blue matching, but the color is good and overall looks like it could've come with the watch. Never putting the OEM back on.
Handsome, well made, comfortable rubber strap. I have had probably a half dozen of them over the years. Very consistently high quality. I wish there were more colors available from the product line.
The Bonneto Cinturini 300d strap is wonderful! Put it on a very rare Doxa 600 quartz and looks wonderful.
Nice and comfortable and great texture.
Cons: The clasp could be a little bit more substantial, a little bit to light but still works well.
And would definitely take it to a professional watch guy to cut the strap. Even with the directions its complicated, and if you screw up your screwed! Too short you get too buy another one 😱
Overall like all CINTURINI products, i highly recommend and would buy again for the right watch.... ☺️
This is my second of these straps. Both on divers. I can attest to their quality. The deployant buckle is of average quality but sturdy and dependable. I wish there were other finish options. All in all I will be adding more of these to my other divers as orange rubber on deployant has become my signature strap choice.
I bought this for my GW-M5610. I've had it on other rubber straps, Natos, and leather. None of them hold a candle to this strap. See no reason to use any other strap. Haven't tried it on a diver yet, but I can guarantee it will look fantastic.
The perfect blue (294) for my Breitling Superocean. Was looking for a summer band and this was perfect. Easy to cut down. I will say the vanilla smell is a bit odd but I suspect it will dissipate over time.
Love this on my Panerai Base Model, and it smells great too! Easy to fit but follow the instructions and remember to measure twice and cut once. I really like the texture on the outside - see images. Cheers!
I’m super pleased with my purchase and love the deployment clasp! I put this on a Citizen Promaster Dive watch and it pairs up well with the watch. Just take your time when sizing which was very easy but you don’t want to cut it too short! I would recommend it to anyone looking at this style strap.
Bonetto Cinturini 300D Black Double Face Rubber Watch Strap. Great strap for my Resco Patriot. Customer service is flat out awesome. You have a question the answer super fast
I was never comfortable with the original rubber buckle strap on my superOcean... it felt either too tight or too loose and was emblazoned with Breitling all over it which I always found unsettling!
After plenty of research I ordered the Bonetto Cinturini 300D and have been REALLY IMPRESSED - so much more comfortable, with the ability to make fine adjustments to the make it the perfect fit.
It LOOKS AMAZING - really high quality and my kids love the faint vanilla scent! The buckle is very secure with both chrome finish and brushed alloy which matches the watch case perfectly.
It's so good - I'm now tempted to buy another orange strap for the summer hols!
Though they are manufactured in Italy, this particular strap is unavailable in the UK. It took around 2 weeks to arrive in the UK from USA which was as expected.
This is a good quality rubber strap that smells like vanilla. It is difficult to cut straight but can be filed down to straighten. I am using this on a Seiko samurai. The samurai uses fat spring pins and this strap does not. I am looking for spring pins to fit the samurai holes. Too bad Holben’s doesn’t sell them.
Second band ordered, fast delivery, quality product. Definitely will be back and recommend. Thank you Holbens
Night and day compared to the original strap. Looks good and feels good! Highly recomended!
After receiving some spot-on advice from Mike, I purchased this BC band to replace the factory strap on my Bulova Chronograph A "Surfboard." Nothing wrong with the OE strap, just don't care for the clasp. This is the fourth BC strap I've purchased from Holben's-they are very comfortable, easy to fit, have excellent quality, and, of course, smell great. At any rate, the color marches the watch perfectly; couldn't be happier. Thank, Mike!
Was keeping my Squale 1521 on it's nice stock leather band until I saw this orange Bonetto Cinturini strap on a watch review on YouTube. Loved the combo they were showing, so I tracked this strap down here. Gotta say, it's absolutely perfect for this watch. The orange matches the minute hand nicely, and complements the blow dial and bezel perfectly.
The strap itself is extremely comfortable, and feels soft but strong/durable. I find the faint vanilla smell pleasing, and it's another sensory cue that I'm wearing one of my favorite watches. I was initially concerned sizing would be difficult or that I would overcut and make the band to small. Instead I found that it was actually rather easy, provided you use a good sharp knife and are very careful in your cuts (measure twice, cut once is the rule of the day here).
Definitely considering picking up another one of these in a different color to use on some of my other watches, as I like this band very much. Glad that Holben's carries Bonneto Cinturini, as they've been great to buy from.
Love this strap so much that I bought a blue and a black one. Very comfortable and plenty of adjustability. Looks great on divers.