This model of a Klingon D7 Battle Cruiser was used in the filming of the television series "Star Trek," which aired on NBC from 1966-1969. In the original series, this is the standard fighter spacecraft of the warlike Klingon Empire. According to the Star Trek story line, Starfleet first makes contact with the Klingon Empire in the year ("stardate") 2151. As a result, the first Klingon Battle cruiser appeared on television in 1968, during the series' third season.