Vintage Korea Mechanical Wind Up Boys Tricycle Toy -Works!

MTU Mechanical Boys Tricycle tin wind-up toy, made in Korea in the 1960s or 1970s.  It is a collectible tin lithograph clockwork toy.  The toy is often referred to as the "Happy Days" tricycle, as indicated on the box.  The figure on the tricycle is made of celluloid or plastic, while the tricycle itself is tin.  It features a revolving bell mechanism.