Well I'll be a monkey's uncle. What you have is a so-called Meteor Robo, namely Metal Leo.
Meteor Robos were part of Microman, one of the two parent lines of Transformers. As their name (somewhat) implies, they change from little metallic meteors into either a robot, condor or lion, and came in either silver or gold. They went unused for Transformers until Beast Wars II, when they were turned into key chains and renamed Egg Beasts:EggleoEggBirdEggrobo
Links courtesy of TFU.info
If you can't find any markings at all (it should say Takara 1974 or something), it may be a KO, but that doesn't make it any less impressive.
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1) BW Neo X-7 Elphaorpha
2) RiD Grimlock, Hightower & Wedge
3) Energon Sledge, Duststorm, Bonecrusher & Wideload
4) Universe 2003 Night Slash Cheetor
5) BW Convobat (red) & Megalligator (purple)
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