This incredible ring was presented by the one and only Francoise Cailles, expert and author of the book “Rene Boivin, jeweler”. The ring “modele Quartre corps” consists of 4 rings which are set in rubies. This ring was made in the 1960/1970 by Rene Boivin. Madame Cailles has given a certificate to guarantee the authenticity of this ring. The ring went for 18.000,- euros. More interesting is the fact that her book is for sale on Amazon for 8,895,95 US dollars. Which is more valuable, the book or the originial ring?