MTO Ostrich Leather Strap in Navy for Cartier Ballon Bleu

There are 2 ways to find the case size of your Cartier Ballon Bleu watch:

1. Use a digital caliper or ruler to measure across the case (excluding the enclosed sapphire crown):

• 28 mm wide – Small model
• 33 mm wide – Medium model
• 36 mm wide – Mid-Size model
• 40 mm wide – Large model
• 42 mm wide – Extra-Large model

2. Check the model number:
The model reference number is typically engraved on the case back. Your warranty card, certificate, or purchase receipt will also list the model reference and case size.

Examples of common model references:

• Small (28mm): W69010Z4, W2BB0010
• Medium (33mm): W6920071, WSBB0046
• Mid-Size (36mm): W69017Z4, WSBB0007
• Large (40mm): WSBB0040, WSBB0061
• Extra-Large (42mm): W69012Z4, W6920042

Because of the Cartier Ballon Bleu's unique recessed lug design, most models use standard spring bars that require a spring bar tool to safely remove and install.

To remove the strap:

1. Insert the forked end of your spring bar tool into the small gap between the leather strap and the metal lug on the back of the watch.
2. Catch the ridge of the spring bar and gently compress it inward (away from the lug) while pushing the strap slightly downward to pop it free from the case.

To install the new strap:

1. Insert one end of the spring bar into the hole on the inside of the watch lug.
2. Use the spring bar tool to compress the opposite end of the spring bar. Carefully slide the tailored end of the strap into the recessed case and release the tool, allowing the spring bar to snap into the second hole.
3. Give the strap a light tug in different directions to ensure both ends of the spring bar are securely locked into the watch case.

If you receive your strap and find that the size is incorrect, don't worry! You can exchange them for the correct size as long as they are in brand new unworn condition. (Shipping fees applies)

This is a made-to-order (MTO) product. Once we receive your order, we will begin the production process. Please allow approximately 2 weeks for your strap to be completed. We appreciate your patience as we craft your product to your specifications.

Our watch straps are crafted using only the finest premium-quality materials. We take great pride in the craftsmanship and durability of our products, and we stand firmly behind their quality. If you experience any issues with your strap due to a manufacturing defect within 30 days of purchase, we will replace it at no additional cost to you.

Please note that this warranty does not cover normal wear and tear, or damage resulting from accidents, misuse, or neglect.

Like to see the strap in person or require us to do the strap changing and installation for you? We are located in Singapore. Our address is 66 East Coast Road, unit 05-14, Singapore 428778. (See opening days and hours on our google page here)

Have a questiont to ask? Reach us via the contact us page here or whatsapp us at +65 91064136.