This pattern is Euro 4 in 1 - 5 wide. It is made with Argentium Sterling Silver. All sterling silver is required to have 92.5 % silver. What the rest is determines the characteristics of the silver. Usually copper and some other metals are added. Copper makes the material harder. In Argentium Silver, the element Germanium is added. The result is a silver that tarnishes very slowly. You can read more about Argentium Sterling Silver on my web site at www.bevsjewelry.com/argentiumsilver.html
I really like the sunflower clasp.
This pattern is Half Persian. It is also made with Argenitum Sterling Silver with the Sunflower clasp.
Here is a close up of the Sunflower Clasp.
Hope you like these selections.