The Ch'ŏnma-ho or spelled as Chonma-ho (Chosŏn'gŭl: 천마호; Hanja: 天馬號), which means "Sky Horse" or Pegasus, is one of North Korea's secretive indigenous main battle tank designs. The tank is also known by the name of 천리마 전차 （千里馬， or the "Chollima Tank". The original Ch'ŏnma-ho is based on the Soviet T-62. There are at least five different operational versions of the Ch'ŏnma-ho. Since its inception, the Ch'ŏnma-ho has been upgraded various times. Not much is known about it, and its most recent public appearance was the 60th Anniversary Parade held in Pyongyang, North Korea, on 25 April 1992, celebrating the 60th anniversary of North Korea's ruling party.