Jugendstil ceramics made by Bohemian firm Amphora I Riessner, Stellmacher & Kessel which created luxury porcelain. Two of their collections received the highest award at the 1893 Columbian Exposition in Chicago and a Gold Medal at the San Francisco Exhibition in the same year. Lasted until the end of World War II.

Gres Bijou pottery ewer. Numbered 3855/45 to base.
Gres Bijou pottery ewer. Impressed Amphora mark and numbered 3855/45 to base. Image © Copyright 2019 Kodner.com, Dania Beach. Fair use license. via https://www.kodner.com/auctions/2018/11/28/important-collection-of-amphora-pottery/79
"Spider lady" vase. ca. 1895.
“Spider lady” vase. ca. 1895. Glazed and enameled porcelain. Impressed 41/576/AMPHORA with printed factory mark and painted PB. Image © 2019 Sotheby’s. Fair use license. via http://www.sothebys.com/en/auctions/ecatalogue/2016/20th-century-design-n09474/lot.102.html
Gres Bijou vase with maiden. Signed "Reissner", impressed Amphora Austria mark and numbered 3165 to base.
Gres Bijou vase with maiden. Signed “Reissner”, impressed Amphora Austria mark and numbered 3165 to base. Image © 1995-2019 eBay Inc. Fair use license. via https://www.ebay.com/itm/Werke-Reissner-Amphora-Gres-Bijou-Vase-/352530643347