Casio CA-53W - Serena Williams

Serena Williams has been spotted wearing the Casio CA-53W, the digital calculator watch that became an icon of the 1980s.

It features a lightweight resin case, a simple digital display, and a built-in calculator with tiny push buttons — a quirky mix of nostalgia and functionality.

An unexpected yet fun choice for one of the greatest athletes of all time, reflecting a playful side to her otherwise fierce on-court presence.