From the Tiffany & Co Website - 

"The graphic motif of our Roman numeral jewelry was inspired by the Atlas clock, first mounted by Tiffany in 1853 and now on the façade of our famous Fifth Avenue flagship store. Featuring strong silhouettes, our Atlas X designs are a powerful reminder to take time into your own hands."  

This particular style of band is no longer in production.

• 18kt white gold
• Size 7 & not resizable
• 5.4 grams

Video Below