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When Hublot announced an upcoming partnership with artist Jeff Koons last month, it raised plenty of speculation. What would the watch look like? Would it resemble a piece of Koons’ art or something altogether different?

The answer came a week later, when the Classic Fusion Balloon Dog was unveiled, along with the MP-14 Origin by Jeff Koons in the Exceptional Timepieces collection.

And indeed, the Balloon Dog watch incorporates many aspects of Koons’ outsize sculptures of the same name that look like the dogs shaped out of balloons you might find at a child’s birthday party.

Handy man: Hublot’s Koons watches reflect the sculptor’s playfulness. Hublot

Despite their puffed-up appearance, they’re hardly childish. Several of the watch’s poofy design elements required material experimentation and technical innovation, including the dial’s inflated-looking convex domes and the case’s rounded, domed titanium screws.…