This isn't metal..but it looks like it should be.PLASTIC MODEL KIT.
Consigliato per bambibi da 3. Recomended for boys from 3 up. Conseille pour les enfants a partir de 3 ans. Empfohlen fur kinder ab 3 jahren.
Se aconseja para ninos a partir de los 3 anos.
English Instructions read...
The first collection of MINI-MODELS in the world that can be assembled very easily, without scissors and without glue. Many intersting ideas, to stimulate the creativity of children. The great novelty of the year.
Not sure what year that must have been!!