ANDRÉ FERNAND THESMAR (1843-1912 )Butterfly, circa 1905-10Circular brooch . Gold proof; the title decoration made with polychrome enamels cloisonné in gold on a gold pearl background. Presented in its original case monogrammed A. B. ( Signed with the monogram A. F. T. and bears the letters A A I and P A R in gold on the back, bears the hallmark of title . Height : 2,6 cm Gross weight : 6,9 gProvenance : Private collection, Paris . Bibliography and related works : Alastair Duncan - The Paris Salons 1895-1914- Jewellery, volume II - Edition Antique Collectors' Club, 1998 . Brooch models with different decorations reproduced on page 233.