Reg. No: 543414 This dates the registration of the pattern to 1909
This advertisement, from the 1911 A La Paix catalogue, shows a Furnival's Diadem transferware set. The complete 116 piece service is shown as retailing there at 120 francs.
A La Paix was a luxury gallery, situated at 34 Avenue de L'Opera in Paris. They sold china, porcelain, art pottery and glass in the 19th century and later had a decorating studio that made art ceramics for the early modernists.