A ref. 25730ST, the first Royal Oak intended to be used as a travel watch. Introduced in 1990, this midsized Royal Oak incorporates a secondary time, date, and power reserve in the Royal Oak case. This example sports the latter grande tapisserie in a vibrant blue, which leans very slightly toward teal in bright sunlight. A complication discontinued from the range for almost a decade now, there is no modern equivalent. A modern classic, it loses nothing of Royal Oak essence despite the added utilitarian charm.