Dec 27 Dec 27 Montblanc 4810 Eternity Ring in 18k Yellow Gold with Diamonds Polka Popp Charlotte Casiraghi, Accessories, Rings Montblanc 4810 Eternity Ring in 18k Yellow Gold with Diamonds From the 4180 collection. Purchase Worn by Charlotte Casiraghi on:19 March 2016 - 2016 Rose Ball Leave a comment