Strap for Tetra 27 Gold

The Tetra 411 features a 18 mm lug width, measured between the spring bar attachment points. This dimension is specific to ensure correct visual proportions between the case lugs and the wrist.

A natural alligator strap with vegetable tanning amplifies the warmth of yellow gold, creating a sophisticated combination. Alternatively, vegetable-tanned calf leather allows a patina that evolves in parallel with the gold, or a cotton NATO maintains the Bauhaus simplicity of the original design.

The Tetra 411 uses standard 18 mm spring bars. Using a spring bar tool, insert the ball into the small notch of the spring bar, retract the internal wire, extract the spring bar from the case and replace it with a compatible 18 mm strap. Ensure the spring bars are fully anchored in their respective holes.

Yes, any strap with an 18 mm lug width is compatible with the Tetra 411. Verify that the lug width is correctly measured: a width smaller than 18 mm would result in instability, whilst a larger width would create visual and functional constriction.

A high-quality leather strap (alligator, calf, shell cordovan) typically lasts 3 to 8 years, depending on daily wear, UV exposure and humidity. Vegetable-tanned leather develops a patina over time, extending aesthetic longevity beyond structural durability. NATO or rubber straps guarantee a longer lifespan, up to 10-15 years.