The updated Rolex Datejust 31 was introduced in 2018 in either rose, white or yellow gold - all powered by the new caliber 2236. The two tone 'Rolesor' variations were added to the collection one year later.Ref. 278245 has a rose gold case with a domed, smooth bezel. It is available with a number of different dials and can be fitted with either an Oyster or President bracelet.