Gilbert Clock Factory, Historic clock factory in Winchester, United States

The Gilbert Clock Factory is a former clock-making complex at 13 Wallens Street in Winsted, Connecticut. Two four-story brick buildings survive, both with late 19th-century commercial Italianate detailing; one stands directly on the bank of the Still River, the other is set up the hill to the east.

William Gilbert and Lucius Clarke started making clocks at this site in the 1840s, and the William L. Gilbert Clock Company was formally established in 1871. The factory grew into one of New England's major timepiece manufacturers and shaped Winchester's economy for decades.

The Gilbert name is tied to Winsted's clock-making trade: William L. Gilbert moved from Bristol in 1840 and built wall and shelf clocks for the mass market. At its height the Wallens Street complex employed more than 500 workers, making the company one of the town's largest employers until it closed in 1964.

The buildings have been converted into residential units and are not open to visitors inside, but the facades are clearly visible from Wallens Street. Walking along Still River gives a good sense of the overall scale of the complex.

In 2018, the site was surveyed for radioactive traces left from the use of radium in clock hand painting, a practice common in early 20th-century factories. No contamination was found that posed any concern for the people living there today.