Antique Wedgwood china patterns are often from the Queen's Ware selection, which date back to the 18th century. From the 1860s, Wedgwood patterns were designated either "common" or "best."
According to Antique Central, the Queen's Ware Wedgwood china pattern originated with Catherine the Great, Empress of Russia. Master potter Josiah Wedgwood created two sets for the Empress, the "Husk" service and the "Frog" service. The Husk service had a pink pattern with flower sprays and festoon borders. The Frog service featured landscape views painted in delicate black.
After the 1860s, Wedgwood produced common tableware patterns which featured plain shapes painted onto a cream-colored base. These pieces included the Filigree, Broseley, Botanical and Willow patterns. Best Wedgwood patterns included pieces painted with ornate patterns. First, pieces painted with pearl ware were dipped into a pearl glaze. Water Nymph, Dahlia and Clarendon are patterns from the "best" designation.
According to ebay, Westwood is especially well-known for its Jasperware pattern. A light blue base is decorated with white scenes of Greek or Roman origin. These are traditionally decorative pieces. Jasperware can be made of two colors of clay or with a single color of clay dipped into a contrasting color.
According to Love to Know, antique Wedgwood china must date to at least 100 years ago. Any pattern manufactured between 1910 and 1985 is considered vintage.