Saltah'na clock

The Saltah'na clock was a time measurements device from the ancient Saltah'na species from the Gamma Quadrant.

In 2369, while under the influence of a Saltah'na energy sphere, Commander Benjamin Sisko built such a complex mechanical clock from its blueprints. 

Sisko kept this clock in his office on board Deep Space 9. 

In an alternate timeline, Jake Sisko kept this clock in his house in Louisiana on Earth.

Benjamin Sisko did some repairs on the clock in early 2372.