【Replacement Stainless Steel Case Back Screw for IWC Portugieser IW3714/IW3716 – Precision 4-Screw Set】 – Precision-engineered replacement case back screw set (后盖螺丝/底盖螺丝) designed specifically for the IWC Portugieser Chronograph IW3714 and IW3716 series-. The iconic 41mm Portugieser case back is secured by 4 screws- – this set provides the exact replacement for all four. Crafted from stainless steel to match the original IWC case material-1-11. Compatible with a wide range of references including IW371446, IW371417, IW371601, IW371604, IW371616, IW371625, and more-. The essential replacement part for restoring the integrity and water resistance of your Portugieser chronograph.
Precision Fit for IW3714 & IW3716 Portugieser Chronographs – Specifically engineered for the IWC Portugieser Chronograph collection-. Compatible with IW3714 (solid case back, Caliber 79350) and IW3716 (exhibition case back, in-house Caliber 69355) references-. The 41mm case back is secured by 4 screws- – this set replaces all of them. Please confirm your specific reference number before ordering.
Premium Stainless Steel Construction – Crafted from high-quality stainless steel – matching the original IWC case material-1-11. Key advantages:
Corrosion-resistant – withstands moisture and daily wear
Precision-machined – exact fit for IWC‘s case back screw system
Durable – maintains structural integrity through years of use
Aftermarket replacement – brand new production, not used or salvaged parts-1-11
Essential for Watch Service & Restoration – The Portugieser case back is secured by 4 miniature screws-. Over time, these screws can become worn, stripped, or lost. Perfect for:
Replacing worn or missing original screws – restore secure case closure
Completing movement service – replace screws removed during maintenance
Restoring case back integrity – ensure proper sealing and water resistance
Keeping a spare set – always have replacements on hand-
Professional Installation Recommended – The Portugieser uses precision flathead screws that require careful handling. Using the wrong screwdriver or excessive force can easily strip the screw head-. Professional installation recommended if you‘re not experienced with watch repair. These are aftermarket replacement parts, not genuine IWC® parts-1-11. However, they are precision-engineered to match the original specifications used on IWC Portugieser chronograph watches.
