Now this is something special! An early 1990s Franck Muller Perpetual Calendar in 18k gold, showcasing the brand’s playful approach to serious watchmaking with its sophisticated automatic movement. The real cherry on top? A #1 engraving on the caseback, adding an extra layer of intrigue and collectibility to this already remarkable piece!

The 18k case measures 43 x 28 mm and is in great condition, with an engraved reference number and #1 engraved on the caseback.

The perpetual calendar dial is in excellent condition.

The automatic perpetual calendar movement is running well.

On a generic alligator skin strap secured by the original 18k buckle.