Basically the same engine as a Space Bug but included a two-piece fuel tank which was cheaper to make than the original Space Bug tank. The tank itself is turned aluminum while the tank back is red, yellow or blue plastic from the Space Bug Junior but is modified to include an aluminum pick-up tube and a larger hole to expose the venturi that is integral to the aluminum tank. The later Babe Bee tank was simply a further developed version of this tank. This engine was only produced during 1955 and sold as a mid-range sport engine for $5.95. As such not many exist today which makes them very rare and collectible selling for over $300US in 2008 and $1000+ in 2012. Beware of fakes! Some unscrupulous sellers have been selling fake Strato Bugs that have a CNC machined tank and a Space Bug Junior back-plate.