20 Things You Didn't Know About Star Trek VI: The Undiscovered Country
19. Kronos One
Chancellor Gorkon, General Chang, and the rest of the Klingon delegation travel to Earth aboard the flagship of the Klingon Empire, namely Kronos One. The ship was the same filming model that had been used in Star Trek: The Motion Picture, with several modifications for the latest film.
Visual Effects Supervisor Bill George was pleased that they were able to update the ship. He also said that it was one of the few models that they were allowed to make any significant changes to, owing, in part, to the fact that it badly needed touching up. The Enterprise, Excelsior, and Bird of Prey filming models had all seen much more recent use.
George took inspiration from the military costuming, and the adornments that could be added post-battle. He painted the model brown and red with gold highlights, then added brass epaulets to the wings, signifying victories in battles that the ship had secured. As both the shape of the ship and its colour were drastically different from Federation vessels, this contrasted nicely against the Enterprise-A.