Louis Erard Fil d’Or Louis Erard x Wire Art technical description Case Case material Polished stainless steel Case diameter 39 mm Case back See through Glass Domed sapphire crystal with anti-reflective treatment on both sides Water resistance 5 bars (50 m/165 ft) Movement Calibre Sellita SW261-1 Movement Automatic Functions HMS Power reserve Around 38 hours Dial & hands Dial Black lacquer base. Hour-markers and chapter ring made of 24K gold soldered points. The geometric cube pattern is also made with 24K soldered gold wire. Hands Rhodium-plated, satin-brushed on top, diamond-polished angles, sword-shaped. Strap Beige grained calf leather with tone-on-tone stitching, black calf leather lining Buckle Pin buckle