Les Copains single button fitted black notched collar blazer. Size 42

Les Copains single button fitted black notched collar blazer. Size 42. Fabrication 100% viscose. Vented back panel. Slight padding on should to create a structured shoulder. The exterior of the sleeve looks like a vented cuff but the sleeve has 2 interior buttons which can be buttoned or unbuttoned to created multiple s styling options. The blazer is fitted. The single front button is missing and would need to be replaced. Please refer to photos. Pre-owned but only worn a few times and in very good condition. Only signs of wear are the missing front button and some stains around arms in lining as blazer was not cleaned before stored.