Strap for Day-Date 36 Yellow Gold Diamonds / President Diamonds / Silver

The lug width (ansa width) of the 118388-0174 is precisely 20 millimetres. This measurement represents the internal distance between the two lugs of the case on which the strap passes are fitted. It is essential to verify this dimension before purchasing an aftermarket strap, as an incorrect measurement compromises installation and case security on the watch.

For a yellow gold 118388-0174, black alligator remains the most classical and recognisable choice in formal contexts. However, vegetable-tanned calf leather in cognac brown tones represents a sophisticated alternative that enhances the thermal richness of the metal. Cordovan shell in burgundy constitutes the option for those seeking durability and natural patina. All these materials ensure aesthetic compatibility with the model's elegant and understated proportions.

The procedure requires specific tools: a spring bar tool or, alternatively, a small flat-head screwdriver. Support the case with its base on a soft surface to avoid scratches. Insert the tool into the small hole on each lug, apply gentle downward pressure to compress the spring inside the lug, then extract the bar from the case. Repeat for the opposite lug. Insert the bars into the new strap, aligning the holes, then reinsert the bars into the case with smooth motion until the locking click is heard. Ensure the strap is properly centred before wearing the watch.

Yes, any strap with a 20-millimetre lug width is mechanically compatible with the 118388-0174, regardless of brand and manufacturer. Compatibility is guaranteed by international dimensional standardisation. However, aesthetic and qualitative compatibility depends on the choice of material, colour and finish: we recommend straps made from vegetable-tanned leather or alligator to optimise final appearance and durability over time.

A high-quality leather strap, vegetable-tanned or alligator, maintains structural and aesthetic integrity between 5 and 8 years of daily use, provided ordinary maintenance is carried out: protection from excessive moisture sources, periodic cleaning, natural air-drying. Cordovan shell, owing to its fibre density, reaches 12 to 15 years of use before requiring replacement. Factors such as humid climate, frequency of wear and maintenance significantly influence this estimate. A strap equipped with a stainless steel deployant clasp provides additional mechanical protection at critical points of wear.