Extremely HUGE storehouses of puzzles for $ale -- superb quality -- excellent prices -- easy page-surfing
Rotate the right-hand double-pc 180°
Flip the right-hand double-pc 180° to the left . . . and place on top of the left-hand pc
Flip whole unit 90° towards you . . . set up last 2 pcs . . . one will place on top, the other will place from the bottom
From each side, push in towards the center to close the puzzle