Strap for Tetra 27 Champagner

The lug width of the Tetra 473 is 18 mm. This dimension is determined by the geometry of the 27.5 mm square case and is the only compatible size with the model's integrated lugs. To verify correct measurement, measure internally between the side walls of the lug, precisely where the strap inserts.

For the Tetra 473, we recommend alligator straps with regular grain (which amplifies the case geometry) or vegetable-tanned calf leather in cognac and burgundy hues (introducing conscious contrast). Alternatively, military NATO straps in canvas and vegetable rubber maintain the formal character of the instrument. Avoid straps with elaborate finishes: the 473 demands material clarity.

The Tetra 473 uses either an integrated loop buckle or a deployant clasp, depending on configuration. To remove the strap, identify the terminals at the strap ends and use a dedicated spring bar tool to release the pin. Insert the new 18 mm strap ensuring the pin clicks into position. If you lack familiarity with the procedure, consult a professional watchmaker.

Yes, any aftermarket 18 mm strap is dimensionally compatible with the Tetra 473. However, we recommend selecting artisanal quality straps that respect the minimalist language of the instrument. Brands specialising in vintage and Bauhaus watch straps ensure aesthetic coherence. Always verify that the strap shoulder fits the case body correctly without gaps.

A high-quality leather strap (alligator or vegetable-tanned calf) lasts approximately 3–5 years under daily wear conditions, with variability depending on climate, humidity, and frequency of use. Leather develops desirable patina over time, evidencing use. To extend lifespan, avoid prolonged exposure to moisture, intense perspiration, and direct sunlight. Periodically treat the leather with dedicated leather oils. Vegetable rubber straps last longer (5–7 years) but do not develop patina.