The 126500LN is the steel Cosmograph Daytona that Rolex introduced in 2023, sixty years after the first Daytona. Its appearance deliberately stays close to its predecessor, the 116500LN: a 40 mm case, a black Cerachrom bezel with tachymeter scale, three sub-dials and screw-down pushers. The differences lie in the details, such as a slightly reworked case and sub-dials with thinner rims.
Inside is calibre 4131, a development of the 4130 with the Chronergy escapement and a power reserve of about 72 hours. The chronograph measures up to twelve hours, and the tachymeter scale converts a measured time into an average speed. The watch is water-resistant to 100 metres and is worn on an Oyster bracelet in Oystersteel. The 126500LN exists with a white and with a black dial.
On a pre-owned example we test the chronograph completely: start, stop, reset and the running of the sub-dials. We also look at the condition of the bezel, the screw-down pushers and the crown, the bracelet and clasp, and the set. With a recent reference such as this one, the guarantee card usually shows remaining manufacturer's warranty.