Stulz Serves ?

AG STULZ @ 3 rue Jean Jacques Rousseau, Strasbourg
Home early last century, which is the work of architect Gustave Oberthur, and built for GA Stulz, along with a workshop (Werkstättengebäude) at the rear of his property. On a header post, we learned that the owner had a porcelain factory (dekoriertes für Porzellan Manufactur / Fabrik für Bronze und Silber-Montierungen / Spezialität in Montiertem Porzellan / Kunstgegenstände / Alt-Strassburg / Sevres, Enamel, Miniatures, Pastelle ). We do not know if the shop built at the back was a research workshop or more a place of manufacture. We have part of the answer to this question in the extract instruction below. The building permit dated 27.04.1904. The occupancy permit is given in early December of the same year. In 1912, entrepreneur J. Nuss, 44, route de Cronenbourg, add a floor to his workshop at the back of his property. The work completed on 11/16/1912.
NB: Gustavus Adolphus Stulz (* 21.02.1865 Strasbourg, Strasbourg 11.28.1931 +) was a miniaturist painter, son of Gustave S., stonemason and Ursula Zimmermann. Trained at the Ecole des Arts Decoratifs in Strasbourg and Sevres porcelain painting. He carried out his work under the microscope with great finesse. The miniatures of his studio were appreciated in Paris and London. His death was due to lead poisoning used in his paintings. Let us add that his daughter Nelly Stulz (1892-1969), poet and painter, described as "Alsatian Chagall" by Hans Haug, has no doubt grown up here, and his brother, Edgar Stulz (1893-1963), surgeon director first trauma Centre of France from 1938 until his death. (source: Roland Anger, in New Dictionary of Biography Alsatian No. 36, pages 3815-3816) http://www.collectorsweekly.com/stories/92695-sevres-mark-by-other-factory.
I have a pair of these Tea Cups and they are absolutely pristine. Hand painted in Bleiu Turquoise with Gold Handle and design (colors used mid 19th century ). The cups are 2" inches high, 4" inches in diameter (top) and 1 3/4" inches in diameter at the base. They are very light in weight and when held up to sunlight somewhat translucent. The ear shape handle fits the time period of between 1750-1800. I tend to think that these pieces were done by Stulz. Any input or suggestions on putting the pieces together on these two beauties is appreciated. Mic