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

The lug width of the SeaQ 1-39-11-09-61-34 is 20 mm. This measurement is the standard for timepieces with a 39.5 mm case diameter and ensures balanced proportions between the case and strap, whether during diving operations or formal wear.

Four primary materials are recommended for the SeaQ: premium alligator (enduring elegance), vegetable-tanned calf leather (develops organic patina), NATO cotton/linen (versatile and reversible), and vulcanised silicone (immediate grip and rapid drying). Material selection depends on intended use: frequent immersions favour NATO or silicone, whilst daily wear benefits from alligator or calf.

To change the strap, you must remove the pass-through pins (retaining rings) that traverse the case lugs. Use a precise tool to extract the pins, taking care not to scratch the case. Insert the new 20 mm strap through the lug holes and reinsert the pins until fully secured. For diving watches such as the SeaQ, it is advisable to have this operation performed by a certified watchmaker to maintain water-resistance integrity.

Yes, you may use certified aftermarket straps with a 20 mm lug width. However, if you intend to use the watch for diving, it is recommended to verify that the strap has been tested for water-resistance. Straps in alligator, calf, or silicone from specialised suppliers maintain mechanical compatibility and do not compromise case water-resistance.

A high-quality leather strap (alligator or vegetable-tanned calf) has an average lifespan of 5-7 years with daily use, provided it receives regular maintenance: hydrophobic wax treatment every 12-18 months and rapid drying after moisture exposure. Occasional diving use extends strap longevity. NATO or silicone straps, being elastomeric materials, maintain functionality for 3-5 years before requiring replacement due to elastic wear.