From DCU Guide
Base of Operation: the End of Time
Height: 6' 10"
Weight: 240 lbs.
First Appearance: (mentioned): Adventure Comics #317 (February 1964)
(seen): Adventure Comics #318 (March 1964)
(as Rokk Krinn): ????
(as Superboy-Prime): ???
Not yet available
For a definitive list of appearances of Time Trapper in chronological order click here
Who's Who: The Definitive Directory of the DC Universe #23 (January 1987)
Who's Who in the Legion of Super-Heroes #7 (November 1988)