4 Caged Puzzle

This puzzle consists of 4 parts and a frame. The goal is to remove the pieces from the frame and then reassemble.
More difficult than it first appears!
Made of beech and locust wood. Dimensions 50 x 50 x 60 mm. 4 puzzle pieces.
Maker: Philos
Number of Players : 1
Recommended age: 8 years +
Playing time: about 20 minutes