A classic Day-Date in the 36mm format, reference 18038 pairs yellow gold with a blue dial for a more restrained take on Rolex's calendar watch. The yellow gold case and matching bracelet keep the look consistent, while the blue dial adds contrast to the familiar layout. Its automatic movement runs the calendar display with the easy practicality the model is known for. At 36mm and 12mm thick, it has the compact, balanced proportions many collectors still favor.