The IWC Portugieser Chronograph IW390303 features a stainless steel case with a diameter of 42mm, a blue dial, and a black alligator leather strap. The watch is powered by the IWC in-house automatic chronograph caliber 89361, with a 44-hour power reserve. The chronograph function includes a stopwatch function with a flyback mechanism, allowing for quick and easy resetting. The Portugieser Chronograph IW390303 also features a date display and small seconds sub-dial. It comes on a black alligator leather strap with a deployant clasp. Its features include a chronograph, a date indicator, and an exhibition caseback. With its classic design and reliable performance, the IWC Portugieser Chronograph IW390303 is a versatile and highly accurate timepiece that is well-suited for everyday wear.