Strap for 150th Anniversary Automatic Small Seconds

The Tissot Heritage T71.3.440.31 has a lug width of 18mm. This measurement, taken between the two inner flanges of the case, ensures a proportionate transition between the case diameter (39.5mm) and the wrist. All straps with 18mm lug width attachment are compatible with this model.

For the T71.3.440.31 in yellow gold, we recommend a cognac alligator strap or dark brown vegetable-tanned calf leather. These materials create a natural chromatic dialogue with the gold: the aged patina of the leather complements the saturation of the case. Alternatively, for formal occasions, an opaque black strap offers maximum sobriety without aesthetic conflict.

Changing the strap on the T71.3.440.31 requires removing the lugs using a small tool (spring bar tool). Position the watch with one lug facing upward, locate the extraction hole on the lateral side of the lug, insert the tool, and press gently until the strap detaches. Repeat for the other lug. The operation requires care to avoid scratching the gold case.

Yes, the T71.3.440.31 is fully compatible with quality aftermarket 18mm straps. Artisanal full-grain leather straps with integrated deployante or classic buckle represent an ideal option for personalising the timepiece. Ensure the attachment is exactly 18mm and that the buckle or closure system is proportionate to the case diameter.

A quality full-grain leather strap, worn daily, maintains structural integrity for 18-24 months on average. Longevity depends on tanning method (vegetable vs synthetic), ambient humidity, and frequency of wear. An alligator or shell cordovan strap with noble metal hardware can exceed 3 years. The patina that forms naturally over time does not compromise functionality but rather enhances its aesthetic character.