Separate? OK !
but mostly; put back to start! (That's the real challenge)
This puzzle is based on an original called the “Puzzle Ring.”
Popularized in 15th century Europe, this ring style was actually used for official engagement and marriage rings.
Christian reformist, Martin Luther, was even known to wear one.
The diameter of the ring is 5,3
Level 4/6. Package size: 7,5 cm x 11,5 cm x 4,5 cm.