Mini-spy

Mini Spies were very small Transformers toys that came packaged with Mini Vehicles in early 1985. Mini Spies were the first toys to feature rubsigns, and the only way to determine whether a given Mini Spy toy was an Autobot or Decepticon was by rubbing the rubsign.

There were three different Mini Spy molds, known by the unofficial names Buggy Type, 4WD Type and Mazda Type, and each was available in blue, white and yellow variations.

The pre-Transformer versions of the Mini Spies were part of a toyline called Mecha Warriors. [1]

From Teletraan I: The Transformers Wiki, a Wikia wiki.