Below is a group picture of all the Time Machines available in the Kronoform line. They are, in order of appearance: Scorpia; Autokron I; X-Kalibor; Robot Time Machine; Inviceptor; Robot Radio Time Machine; Hi-Band Blaster; Kaltor; Deceptor and Autoceptor. Another Time Machine that isn't pictured is Autokron II.
It is assumed that these were sold individually, but could also have been sold in a set. The most interesting ones are Scorpia, which is basically a 6-legged Scorpion; and X-Kalibor, which transforms into a gun, complete with tripod, scope and trigger!
Each one seems to also have had different color variations as well.