Launched in 2014, The Spirit of Big Bang is a line that expands the brand's flagship Big Bang series into a tonneau (barrel-shaped) case. While retaining signature Big Bang design elements, Such as the six H-shaped screws on the bezel and the skeleton dial, The new case shape lends the collection its signature structural characteristics. The series has since expanded, Focusing on chronograph models, With around thirty references in a variety of materials and colors. Based on Hublot's "Art of Fusion" philosophy, The Spirit of Big Bang offers a new case configuration as an extension of the Big Bang collection.

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