Allegria Designs Humpback Whale Pin The pins are sculptured from silver plated pewter that has been oxidised and buffed to obtain a contemporary, antique look. They are so adorable, we know you will love them. Approximately 3,000 will migrate each season between Antarctica and the Great Barrier Reef in Queensland. All pins come in a gift box so make great presents for friends â€“ especially easy to mail overseas. Weight: 18 g in gift box.