This casting was first released as Mantis for 1970. It had an opening canopy and an exposed metal engine/exh. pipes. For the 1973 release the name was changed to Double Vision and solid louvers replaced the exposed, rear-mounted engine. The casting was later renamed Speed Seeker for three releases from 1984 through 1987. After a nine year absence it was again released a few more times with a new name of Speed Machine. The major difference for the latest release is that the canopy doesn't open.