Philippe Wolfers - A rare Art Nouveau gold, silver, plique-à-jour enamel, diamond and opal brooch, with later alterations. Designed as a swan with its wings spread, the body in opal. Probably altered in 1950 with the addition of diamonds surmounting the swan's head and the crescent moon. Signed PW on reverse and inscribed "Ex. Unique" Art Deco, Art Nouveau, Art Deco Jewelry, Antique Jewelry, Vintage Jewelry, Vintage Jewellery, Jewelery, Fine Jewelry, Jewlery