Old and single-cut diamonds, French import assay marks for platinum (950‰) and 18K white gold (750‰), circa 1935 Maison René Boivin, 2025: Certificate of Authenticity n°202509YPA, original piece manufactured by René Boivin circa 1935 after a drawing by Suzanne Belperron Insurance appraisal document by René Boivin dated September 30, 1976 Diamonds: for an approximate total weight of 6.50-7.50 carats Size/Dimensions: 5.6 x 3.1 cm Gross weight: 21.00 grams