Day-Date 40 Black Bay 31/36/39/41 S&G The bezel features a tachymetric

The bezel features a tachymetric scale to read average speed over a given distance based on elapsed time

with a uni-directional rotating ceramic bezel

with 5 diamonds dial

polished center links

Day-Date 40 Black Bay 31/36/39/41 S&G The bezel features a tachymetricEisenkiesel dial This dial features 10 baguette cut diamonds. The Oyster Perpetual Day Date 40 is presented with a dial made from eisenkiesel, a deep brown decorative stone used by the brand for the first time in 2021. Eisenkiesel is an iron oxide, delicately veined quartz. The stone discs destined for the dials are cut from a block of raw material. Only those whose colour and structure fully satisfy the brands exacting aesthetic requirements are