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2764, 2940, 3009, 3065, 3130, 3131, 3133, 3134, 3359, 3372,3696,4392,5006,5010, 5011, 5015, 5052, 6011, 6015, 6050, 6056
If your reference appears in the selection list shown in the photos, these spring bars are correctly matched to your model.
Most Bubbleback models use the uncommon 16.7 mm lug specification, making correct spring bars extremely difficult to source. These are not generic 16 mm or 17 mm alternatives. They are purpose built to fit authentic Bubbleback cases with exact tolerance, proper shoulder profile, and correct spring tension.
Designed for collectors, watchmakers, and professionals who demand period correct fit and long term security.
2764, 2940, 3009, 3065, 3130, 3131, 3133, 3134, 3359, 3372,3696,4392,5006,5010, 5011, 5015, 5052, 6011, 6015, 6050, 6056
If your reference appears in the selection list shown in the photos, these spring bars are correctly matched to your model.
Engineered specifically for vintage Rolex Bubbleback models produced between 1930 and the 1960s, these precision spring bars are manufactured to match original factory dimensions and performance.
Built for Vintage Rolex Bubbleback Models 29 mm to 31 mm
Designed exclusively for early Rolex Bubbleback cases with factory accurate dimensions and tolerances.
Correct 16.7 mm specification
Proper shoulder geometry for vintage tools
Precise lug engagement
Secure locking inside original lug holes
No modification required
No compromise on fit
No measuring
No guessing
Exact vintage fit
Manufactured from high grade Swiss standard 316 stainless steel for maximum durability and corrosion resistance.
Precision machined
Engineered for long term elasticity
Built for professional installation
Designed for daily wear
Each spring bar is tested to ensure consistent compression and secure locking inside vintage lugs.
No weak springs
No loose tolerances
No deformation over time
Maintains correct tension even after repeated bracelet or strap changes.
Precision Design for Vintage Installation
Optimized for early Oyster bracelets and leather straps used on Bubbleback models.
Correct shoulder placement
Secure seating inside vintage lug holes
Authentic installation feel
Our yellow gold color spring bars are finished using professional grade PVD coating engineered for long term durability and color stability.
Strong molecular bond to steel
Exceptional resistance to wear and fading
Designed for frequent strap changes
Maintains original tone and brilliance
Material Swiss standard 316 stainless steel
Correct size 16.7 mm for Bubbleback (Lug Size)
Compatibility Rolex Bubbleback 29 mm to 31 mm
Era 1930 to 1960s production
Finish options Stainless steel or yellow gold color
Use Professional bracelet and strap installation
Warranty Lifetime
Built for collectors.
Trusted by watchmakers.
Manufactured to factory standards.
Made to Swiss standards for Milano Straps inc USA.
This product is not manufactured by Rolex SA and is not an official Rolex component. Rolex is a registered trademark of Rolex SA.
Hey there! It's pretty simple: we totally want you to fall in love with what you buy from us, just like we have. Not feeling it 100%? No stress! Just hit us up, and we promise we'll sort it out for you.
Always measure the watch lug width, not the spring bar itself. The correct size is the distance between the inner edges of the lugs where the strap sits. Measuring the spring bar can be misleading because spring bars compress and extend.
Use a digital caliper for the most accurate result. Measure the inside distance between the lugs in millimeters. If you do not have a caliper, a ruler can be used, but accuracy may vary. Always round to the nearest standard size such as 18 mm, 20 mm, or 22 mm.
Spring bars are spring loaded and can appear shorter or longer depending on compression. Measuring the spring bar itself often results in the wrong size. The lug width of the watch case is the only reliable reference.
Thickness depends on the watch and strap.
1.5 mm is ideal for dress watches, vintage watches, and straps with tighter tolerances.
1.8 mm offers increased strength and is recommended for sports watches, tool watches, and heavier straps.
Always ensure your lug holes and strap can accommodate the selected thickness.
Yes. These spring bars are designed with precise tolerances to fit both standard lug holes and solid lug hole cases. For solid lug watches, always verify that the lug hole diameter supports the selected thickness before installation.
No. Many spring bars look the same on the outside, but the quality can be completely different. Cheap spring bars are often made from low grade steel with weak springs, while premium spring bars are made to manufacturer and Swiss standards.
Yes. Spring bars hold your watch on your wrist. Low quality spring bars can bend, lose tension, or break over time, which can cause your watch to fall and get damaged. A broken spring bar can cost far more than a proper high quality replacement.
High quality spring bars are made from 316 stainless steel, use stronger internal springs, and are tested for tension and durability. They resist corrosion, keep their strength over time, and provide much better security for your watch.
MADE IN ITALY
Finest Premium Italian Leather
Swiss Structure and Hardware
Designed By Watchmaker
Craftsmanship and Testing
How to Measure a Watch Strap :
Remove the Strap (if needed):
- Take off the watch strap if it is still attached. This ensures precise measurement of the lug width.
2. Locate the Watch Lugs:
- The lugs are the small metal bars or openings on the watch case where the strap attaches.
3. Measure the Lug Width:
- Place the ruler across the inside of the lugs.
- Measure the distance between the two inner edges of the lugs (in millimeters).
4. Determine the Strap Width:
- The strap width should match the lug width to fit securely.
- For example, if the lug width is 20 mm, you need a strap that is also 20 mm wide.
💡 Pro Tip: Use a precision ruler or caliper for the most accurate measurements.
![[product_name]-Milano Straps](http://milanostraps.com/cdn/shop/files/Screenshot_2023-01-27_at_10.10.08_PM.jpg?v=1674875775&width=1466)
Our watch bands are designed with convenience in mind. They can be changed out quickly and easily, allowing you to switch up the look of your watch in no time. The process is simple and straightforward. All you need to do is rotate the band, and then clip it into place. This means you can change the band of your watch in the blink of an eye to suit your needs and preferences at any given time. Whether you want to match your watch band to your outfit, or you want to switch from a sporty band to a formal one, it's all possible with our quick-change design. This feature is great for those who like to change their look often and those who want to have multiple options of band styles.
We're proud of our brand, and we're always looking for ways to improve and evolve. We're always open to feedback and suggestions, so please don't hesitate to reach out and let us know what you think.
If you're looking for a new watch strap, or just a new leather accessory, we invite you to browse our collection and discover the Milano Straps difference for yourself.
