This is a  circa 1920 Kliegl Brothers proyection light in working condition. Include a spare original Bulb.

Kliegl Brothers Universal Electric Stage Lighting Company was an American manufacturer of electrical stage lighting products in the 20th century. The company had a significant influence in the development of theatrical, cinema, television, and specialty lighting. It equipped many major performing venues in the United States and its products were used in several other countries as well. Their eponymous product, the Klieglight, was the trade name for two quite different production lights manufactured by the company, and survives today in both industry argot and in popular idiom as a synonym for "spotlight" or "center of attention