Touch of Time Antiques has dated this piece to the 1890s.
Dating from the Art Nouveau period (c.

The forms are delicately fluted and lobed, and the china itself is of the finest quality—thin, translucent, and light. Unlike transfer-printed designs of the time, this set features completely hand-painted decoration, suggesting a possible private commission. A rare and outstanding find.
Dimensions:
Cup: 7cm high, 250ml
Saucer: 14.5cm diameter
Side plate: 18.2cm diameter
Dessert plate: 20.5cm diameter
Condition: Excellent, no damage or restoration and only minimal handling ware.
Touch of Time Antiques has dated this piece to the 1890s.
You can view the stock and full dealer information on the Touch of Time Antiques Profile Page