【Replacement 0.7mm Caseback Screw Set for Longines L4 La Grande Classique – Stainless Steel 6-Piece Set for L4.755/L4.766/L4.800】 – Precision-engineered replacement caseback screw set designed for the Longines La Grande Classique (嘉岚) series. Compatible with L4.755, L4.766, L4.800, L4.708, and all L4 La Grande Classique references that use the 6-screw caseback system-. Each set includes 6 stainless steel screws – the exact number needed for a complete caseback replacement-6. Crafted from premium
stainless steel – offering superior corrosion resistance and long-term durability--5. Available in Silver and Gold finishes to match your original caseback hardware--5. Precision-machined to match the original thread profile, head diameter, and length specification of L4 series cases, ensuring proper engagement and stable fastening-6-25. The essential replacement part for restoring secure case closure on your La Grande Classique timepiece.
Precision Fit for Longines La Grande Classique Series – Specifically engineered for the iconic La Grande Classique (嘉岚) collection – one of Longines‘ most recognized ultra-thin watch lines. Compatible with L4.755, L4.766, L4.708, L4.800, and all L4 references that feature the distinctive 6-screw caseback system-. The caseback of the La Grande Classique is secured by 6 miniature screws – this set replaces all of them-. Precision-machined to match the original thread profile, head diameter, and length specification used on L4 series cases-6-25.
Premium Stainless Steel – Built to Last – Crafted from stainless steel – the same corrosion-resistant material used in premium watch cases-5. Key advantages:
Corrosion-resistant – withstands sweat, moisture, and daily wear
Precision-machined – exact fit for Longines‘ caseback screw system
Durable – maintains structural integrity through years of use
Available in Silver and Gold – match your original caseback hardware-
Essential for Watch Service & Restoration – The La Grande Classique caseback is secured by 6 miniature screws-. Over time, these screws can become worn, stripped, corroded, or lost-6-25. Perfect for: Replacing worn, stripped, or missing original screws – restore secure case closure; Completing battery replacement service – a common maintenance task for quartz L4 models; Restoring caseback integrity – ensure proper sealing against dust and moisture; Keeping a spare set – always have replacements on hand.
Professional Installation Recommended – The La Grande Classique uses extremely fine screws – 0.7mm diameter-. Using the wrong screwdriver or excessive force can easily strip the screw head or snap the screw-. Professional installation is recommended to prevent thread damage and ensure proper case sealing-6-25. If you are not experienced with watch repair, please seek professional assistance – broken screws require specialized removal services-.
Important Compatibility Note – The La Grande Classique series uses flathead (一字) screws, not Phillips (十字) screws-. Using the wrong screwdriver type can damage the screw heads. These are aftermarket replacement parts, not genuine Longines® parts-6-25. However, they are precision-engineered to match the original thread profile, head diameter, and length specification used on L4 series cases-6.
stainless steel – offering superior corrosion resistance and long-term durability--5. Available in Silver and Gold finishes to match your original caseback hardware--5. Precision-machined to match the original thread profile, head diameter, and length specification of L4 series cases, ensuring proper engagement and stable fastening-6-25. The essential replacement part for restoring secure case closure on your La Grande Classique timepiece.
