Review for LEGO set 6339 Shuttle Launch Pad from Brickipedia
“The set included shuttle bears the number "2", while the shuttle in 6544 Shuttle Transcon 2 (which was identical to the one here) bears the number "3". This is a tribute to the shuttle that appeared in 6346 Shuttle Launching Crew from 1992, which was actually the first space... More shuttle of the space agency featured in Launch Command. Whereas the orbiter in 1682 Space Shuttle was emblazoned with the NASA logo.”
Full review at brickipedia.fandom.com