In 1863, Charvet was considered the first producer of fine shirts in Paris, claiming superiority "for taste and for elegance" on cuffs, bib and fit. Charvet's store was a "very important" destination for English visitors in Paris. In the following years, Charvet developed its specialization in royal trousseaux. In 1878, he won a silver medal at the World Fair and a gold medal at the 1889 Paris World's fair, for which the Eiffel tower was built. When it won the latter, the jury noted: "Fine shirts remain the property and glory of Paris. To be convinced of it, it is sufficient to give a look to the displays of the companies specialized in royal haberdashery". Other royal patrons confirmed this princely speciality of Charvet, such as Alfonso XII of Spain (1878), Antoine, duke of Montpensier (1879), Philippe, comte de Paris (1893), and sultan Abdul Hamid II (See List of Charvet customers).