IWC Portuguese Series IW371605 Automatic winding stainless steel 41mm. Classic layout of the dial The silver-white matte dial, blue Arabic numeral hour markers and blue steel hands are the signature color scheme of the Portuguese chronometer ◦ Classic double-dial chronograph layout: ◦ 12 o 'clock position sub-board: 30-minute cumulative timing ◦ 6 o 'clock sub-dial: Independent regular small seconds hand ◦ Outer ring scale track: Chronograph seconds ruler, used for precise timing readings ◦ The words "CHRONOGRAPH AUTOMATIC" are printed on the left side of the dial, indicating the automatic chronograph movement Strap: Black fishskin strap, paired with an original factory stainless steel folding clasp, suitable for both formal and light business wear.