NOTE: Pattern was also produced with an iridized (carnival glass) finish. Fenton Glass The First Twenty-five Years by Heacock shows it in carnival in a catalog page which he’s dated c. 1911 (page 83). Opalescent Glass A-Z book puts a c1911 date on it.
NOTE: Paul Kirk Jr - It's also known in transparent pink and green, issued in those colors around 1929