"The jeweller Gustave Wolfers in Brussels began to make orders of very good quality around 1880. He made all Belgian Orders. One finds his name also on the stars of many foreign Orders including those of Portugal. However, he did not make any of these Orders; he rather purchased them from Rothe in Vienna and Arthus Bertrand & Beranger in Paris. Address: 35 rue de la Madeleine. Shortly after 1900 the name changed to "G. Wolfers & Fils." The firm remained in the family until about 1980."
Source: Antonio M. Trigueiros and Gustav A. Tammann (1997) The three Portugese military orders of knighthood, 1789-1910: The Order of Christ, the Order of Avis, and the Order of Santiago: a guide for collectors.
Unfortunately this short paragraph from the Trigueiros and Tammann book is full of mistakes.
Wolfers firm was established around 1840 and changed its name to "G. Wolfers et Fils" ("G. Wolfers&Sons" - Guilaume and Gustave) around 1870. In 1888 the name of the firm was changed once again to "Gustave Wolfers". Since 1930 and until 1960 the firm was known as "Maison Gustave Wolfers S.A.". After 1960 it changed its name to "Ancienne Maison G. Wolfers". Firm ceased to exist in 1975.
5th class order.
Silver, gilt, enamel.
Size 60 mm.
Cartouche reads: Gustave Wolfers Bijoutier, Rue de la Madeleine 35, Bruxelles.