Lynne, your white vase is Sowerby pattern 1188. It is shown in Glen's Sowerby Vol 1, Victoria to George V, CD - catalogue dated 1882, page 2, pattern #1188. It's also shown in Jenny Thompson's The Identification of English Pressed Glass, p27, which shows a page from a pattern book dated c.1879, all being made in vitro-porcelain, which is your white finish, of course.