Strap for Diver Quartz GMT Black - Red / Rubber

The lug width (ansa width) of the Formex Diver 2100.3.2072.960 is 22mm. This measurement represents the internal distance between the two lugs (spring bars) that support the strap. To verify correctly, position a digital calliper between the spring bars: it should read exactly 22mm. This dimension is standard for diver watches in this category and allows for a wide variety of compatible aftermarket straps.

The Formex Diver 2100.3.2072.960, being a technical instrument with aquatic vocation, pairs ideally with vulcanised rubber straps (pure functionality) or NATO straps in regenerated technical fabrics (aesthetic-functional compromise). If you desire greater elegance in non-aquatic contexts, you may opt for structured leather with vegetable tanning and pronounced grain. We advise against smooth and delicate leather, which would not tolerate prolonged moisture. Compatibility depends not only on lug width (22mm) but also on the thickness of the strap's pass-through: we recommend direct verification with specialist artisans.

To change the strap, you must remove the two spring bars that join the strap to the case. Use a dedicated tool (spring bar tool) or a very thin screwdriver to apply lateral pressure on each spring bar, sliding them out of the lug holes. Extract the spring bar from the case and old strap. Next, insert the spring bar into the new strap, align the holes with the case lugs, and reinsert the spring bar with even pressure until it clicks into place. Verify that the strap is properly centred relative to the case before wearing.

Yes, the Formex Diver 2100.3.2072.960 supports a wide variety of aftermarket straps thanks to its standardised 22mm lug width. Straps are available in artisanal leather (vegetable tanning, alligator, shell cordovan), NATO in regenerated technical fabrics, and vulcanised rubber. However, not all straps with 22mm lug width are compatible with this specific reference: the thickness and width of the strap's pass-through must correspond to the geometry of the Formex's lugs. We recommend verifying compatibility before purchase by consulting specialist artisans or detailed technical data sheets.

The durability of a leather strap depends on the type of tanning and usage. A high-quality leather strap with vegetable tanning, subjected to proper maintenance (gentle cleaning, periodic conditioning with natural oils), can last 3–5 years under normal conditions. However, if exposed frequently to salt water, prolonged moisture, or intense perspiration, durability decreases to 1–2 years. To maximise longevity, avoid wearing the leather strap during actual diving or extended bathing; instead, opt for vulcanised rubber or NATO in these contexts. Leather is permeable to moisture and, whilst aesthetically appealing, represents a sacrificial material in aggressive aquatic environments.