MTO Pilot Buttero Leather Strap in Olive for IWC (Mark Series, Chronograph, Big Pilot)

There are 2 ways to find the correct strap size for your IWC Pilot watch:

1. Use a digital caliper or ruler to measure the lug width (the distance between the inside of the lugs where the strap fits):

• 20 mm lug width: Mark XX, Mark XVIII, Mark XVII, Mark XVI, Chronograph 41 (IW3881), Spitfire Chronograph, Top Gun Automatic (41mm)
• 21 mm lug width: Big Pilot 43 (IW3293), Chronograph 43 (IW3777 / Le Petit Prince), Top Gun Chronograph (44.5mm)
• 22 mm lug width: Big Pilot 46 (IW5010 / IW5009), Big Pilot Perpetual Calendar, Timezoner

1. Check the model reference number:
   The model reference number (beginning with "IW") is engraved on the case back, or listed on your warranty card, certificate, and original purchase receipt. This reference directly indicates your specific model and its corresponding lug width.

Examples of model references:

• 20 mm Fits: IW3282 (Mark XX), IW3270 (Mark XVIII), IW3881 (Chronograph 41), IW3269 (Top Gun Automatic)
• 21 mm Fits: IW3293 (Big Pilot 43), IW3777 (Chronograph 43)
• 22 mm Fits: IW5010 (Big Pilot 46), IW3950 (Timezoner)

To measure the buckle width, use the same method as measuring the lug width. Simply measure the distance between the two ends of the buckle where it attaches to the strap. This ensures the buckle width matches the strap for a secure and proper fit. Use a ruler or caliper for precise measurement, typically in millimeters.

Type 1: Installing on a Traditional Spring Bar Setup

If the watch is currently using standard spring bars (or if the customer removes the factory IWC bars to use aftermarket ones), this is a straightforward drop-in installation.

• Step 1: Turn the watch face down on a soft microfiber cloth to protect the crystal and bezel.
• Step 2: Ensure the watch case has standard spring bars removed, leaving the lug holes completely open.
• Step 3: Take your new strap and insert one end of its integrated quick-release spring bar into the bottom lug hole.
• Step 4: Using your fingernail, retract the integrated quick-release knob on the strap backward to compress the pin.
• Step 5: Align the strap with the upper lug hole, release the knob, and gently wiggle the strap until you hear the pin click securely into place. Repeat for the other side.

Type 2: Interfacing with the IWC EasX-CHANGE® System

If the customer currently has an IWC OEM strap or bracelet mounted, the watch case utilizes IWC's factory fixed spring bars. To mount your standard quick-release strap, the factory IWC spring bars must be completely removed first.

⚠️ Critical Compatibility Note: Standard quick-release straps cannot "click" directly into the IWC EasX-CHANGE® system hardware. The integrated quick-release spring bar inside your strap must interface directly with the watch’s lug holes, not IWC's proprietary bars.

• Step 1: Turn the watch face down on a soft surface.
• Step 2: Remove the existing IWC OEM strap by pulling back its integrated EasX-CHANGE® lever and lifting it away.
• Step 3: Use a standard spring bar tool to remove the factory IWC spring bars left behind in the lugs. (Store these safely, as they are proprietary to IWC straps).
• Step 4: Once the watch lugs are completely empty, take your new standard quick-release strap.
• Step 5: Slot one side of the strap's built-in pin into a lug hole, pull back the quick-release knob, slide it into the opposite lug hole, and release the knob to lock it in.

Unfortunately, this Made-To-Order (MTO) strap is made from scratch according to the specifications that you have selected. As a result, we are unable to change the size or issue a refund once the item has been crafted. Therefore, if you have any questions regarding the measurements or sizing of your strap, please consult us via the contact us page or whatsapp us at +65 89050419 before placing your order.

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.