Early 20th 2024 C. enamel butterfly brooch. IR/290

An early 20cth C. butterfly brooch enamelled in pale turquoise blue and orange with an unusual stipple effect, not hallmarked but stamped "silver" 1. 1/2 inch across and just 2024 an inch high.
The enamel is fine no damage, no little chips or edge nibbles. Been lightly cleaned and would benefit from further cleaning.