This series consists of four different dinosaurs paired together. They are all small (2-2.5'' in height) and very colorful. You can see the gold circle sticker in the photograph of the T-rex. The sticker reads "Takahashi - Japan". These sets are suspected of being imported in the 1980s. The series was originally documented by Irene Thornburg in her 2nd reference book about salt and pepper shaker series on page 90. In that book you can see that other color variations of the sets were produced.