IWC, Portuguese series, model: IW545404, manual mechanical, 44mm case diameter, single case, case: polished stainless steel round case, with double-sided anti-reflective arched edge sapphire crystal and transparent sapphire caseback; • Dial: Black dial with white small seconds sub-dial, Arabic numeral hour markers and blue steel hands. Independent small seconds sub-dial at 6 o 'clock, no extra function Windows. The style is minimalist and pure, with high recognition