Strap for SeaQ Date Stainless Steel / Green / Synthetic - Folding

The SeaQ 1-39-11-13-63-34 features a lug width of 20 mm. This measurement represents the linear distance between the lug shoulders (including the passant) measured on the caseback. The 20 mm dimension was calibrated in proportion to the case diameter (39.50 mm) and overall thickness (14.45 mm), ensuring a unique aesthetic and functional balance within the luxury diver segment.

Selection depends on primary usage. For owners alternating diving with formal contexts, premium alligator (fine grain, 1.6–1.8 mm thickness) offers elegance and durability. Vegetable-tanned calf evolves over time with natural patina and enriches the watch visually. Natural linen NATO maintains functional immediacy, ideal for those prioritising daily practicality. For dry environments, shell cordovan communicates refined construction. Satinised FKM rubber in black or tobacco brown represents the ideal compromise between water resistance and aesthetic sobriety.

The SeaQ 1-39-11-13-63-34 uses straight, non-tapered lugs, allowing rapid replacement without specialised tools. Procedure: (1) gently remove the original strap by sliding out the lateral pins; (2) position the new strap, aligning the holes with the case lugs; (3) reinsert the pins with decisive but controlled movement, avoiding force. Warning: do not exceed the 20 mm lug width to prevent aesthetic imbalance and functional misalignment. If uncertain about the procedure, Atelier Casati Milano offers bespoke consultation for installation.

Yes, provided they respect the 20 mm lug width and maintain standard thickness (1.4–1.8 mm). Artisanal straps produced by specialist workshops such as Atelier Casati Milano are fully compatible and often superior to originals in construction quality and selected materials. Ensure the strap presents no protruding rivets or cushions that could interfere with the screw crown or caseback. Always verify measurements before purchase.

Leather strap durability depends on three factors: tanning quality, diving frequency, and maintenance. Premium vegetable-tanned calf resists 3–5 years with occasional diving (1–2 times monthly) and regular maintenance (cleaning, conditioning with vegetable wax). Alligator, denser and more resilient, can exceed 7 years under identical conditions. Repeated exposure to salt water accelerates ageing: rinse the strap with fresh water after every dive and allow it to air-dry completely. FKM rubber offers 5–8 years of useful life without maintenance concerns, making it ideal for frequent aquatic use.