Speedmaster heritage Powered by the 9900 calibre movement 44. 25mm stainless steel case paired with a stainless steel bracelet Tachymeter feature Master Chronometer officially certified by METASRACING HERITAGE The Speedmaster Racing collection celebrates the iconic models racing heritage. A distinctive racing style minute track and vivid orange details add a sporty touch to the sun-brushed grey dial, while 12-hour and 60-minute recorders add enhanced functionality for the racetrack. OPTIMUM PRECISION This 44. 25mm model features a stainless steel case, paired with a stainless steel bracelet. The black ceramic bezel ring features the brands famous tachymeter scale in striking orange Liquidmetal.Delivering flawless performance, the 9900 calibre movement has been officially certified by the prestigious Swiss Federal Institute of Metrology (METAS) and is water resistant to 5 bar (50 metres).