Antique cobalt blue colour glass demijohns (c.1920) Style: French Provincial Materials and techniques: Blown glass Place of origin: France Epoch: Early twentieth century Date of manufacture: Around 1900 Condition: Good. Wear consistent with age and use. The state of conservation is optimal, except for the characteristic imperfections of any antique furniture due to the course of the years. Give a point of originality to your home with these unique pieces, which merge with the contemporary style bringing personality to your home.