1992‎ Playmates Teenage Mutant Ninja Turtles Mutations Michelangelo & Leonardo

These are vintage 1992 Playmates Teenage Mutant Ninja Turtles Mutations action figures of Michelangelo (left) and Leonardo (right).  They are part of the Mutations line, designed to transform from a small pet turtle into a full-sized mutant ninja.  The figures were produced by Playmates and branded with Mirage Studios.  Michelangelo is identified by his orange mask and the M on his belt buckle, while Leonardo wears a blue mask with an L on his buckle.  The transformation is achieved through a series of twists and shifts of the limbs and shell.