I'm sure most of you are aware how the mechanism of this type of double clip brooch works, but I've stumbled across some good images of such a jewel in various stages of transforming from brooch to clips and thought it might be worth posting, if only for the rare opportunity to examine the back of a piece of jewellery.
The brooch is currently offered by Joyería Marta Alcolea in Barcelona http://www.martalcolea.com/ via 1stdibs.