Strap for Seamaster Aqua Terra 150M Co-Axial 30 White Gold / Diamond / MOP / Bracelet

The lug width of the 231.55.30.20.55.003 is 20mm. This parameter is critical for strap compatibility and should not be confused with the leather thickness at the insertion point, which must be maintained between 1.2 and 1.4mm to ensure aesthetic harmony with the integrated case.

For the 231.55.30.20.55.003 we recommend pearl grey or grey-blue alligator (which complements the dial), dark brown calf leather for those who appreciate the sports heritage, or burgundy shell cordovan for a natural patina that ages elegantly. The choice depends on intended use: formal elegance with alligator, versatility with calf, character with cordovan.

The 231.55.30.20.55.003 features an integrated bracelet with soldered lugs. Strap replacement requires the use of a spring bar remover to extract the spring bars from the case seats. We recommend consulting a qualified watchmaker to avoid scratches on the white gold case or improper spring bar reinstallation.

Yes, but with caution. Aftermarket 20mm straps are technically compatible; however, construction quality varies significantly. We recommend Italian artisanal straps with double stitching and custom workmanship to ensure aesthetic coherence and durability exceeding 5-7 years of intensive use.

A high-quality artisanal leather strap, with vegetable tanning, lasts an average of 5-8 years in moderate daily use. Longevity depends on the tanning method (vegetable tanning ages better than chrome tanning), thickness (1.2-1.4mm is optimal for 20mm), and maintenance (avoid prolonged water exposure and occasionally apply a neutral conditioner). Shell cordovan straps have superior potential durability thanks to the natural density of the leather.