In the early TV series, Captain Video used three different space ships. The first two were the X-9 and X-10. What was the name of the third?

The long-running series, set in Earth's distant future, tracked the adventures of a group of fighters for truth and justice, known as The Video Rangers. They were led by Captain Video (no first name ever was mentioned). The Video Rangers operated from a secret base on a mountaintop whose location was unspecified. Captain Video eventually had the use of three different spaceships. In the first ship, the X-9 (later replaced briefly by the X-10), the crew at takeoff lay upon tilted bunk beds on their elbows, a posture based upon space travel theories of the time. Later, the V-2 rocket-like ship named "Galaxy" had an aircraft-style cockpit with reclining seats. The Captain's final spacecraft, after early 1953, was the "Galaxy II."