Bremont Watch Altitude 39 Date Silver Leather ALT39-DT-SS-SI-L-S. The MB format reinterpreted as an ultra-durable tool watch for everyday wear. The dial language, case contours and impervious engineering of the MB, now incorporated in a streamlined timepiece ideal for all situations. The 39mm Trip-Tick case, featuring a single crown, is crafted from high-grade 904L stainless steel, meaning superior corrosion resistance and strength, with a centre barrel in black DLC-coated stainless steel. The highly reliable BB14 calibre is again used, protected as ever by a shock-absorbing inner mounting and antimagnetic shielding.