Adapted from the Ultra Deep, which made history by reaching the deepest place on Earth in 2019 Seamaster heritage with the 8912 calibre movement Water resistant to 600 bar (6000 metres) 45. 5mm O-MEGASTEEL case with a black and cyan rubber strap Grade 5 titanium caseback with laser-engraved Sonar emblem REACHING HISTORIC DEPTHSThe Ultra Deep made history when it reached the deepest place on Earth during the Five Deeps Exhibition in 2019. Adapted from that record breaking model, this unique collection has been tested in real ocean conditions, is water resistant to an impressive 600 bar, and comes with an extra diver extension for the strap. Meeting the ISO 6425: 2018 standard for saturation diverswatches, this remarkable timepiece can perform at new depths. UNRIVALLED PRECISION MEETS BOLD DESIGNThis 45. 5mm timepiece features an O-MEGASTEEL case, paired with a black rubber strap with a vibrant cyan lining. O-MEGASTEEL is a new, high performance stainless steel alloy offering greater p