Underwood typewriter "standard portable typewriter"

Superb typewriter model "standard portable typewriter" of the 30s made in usa. Perfect as a decorative element, its working condition is good and all keys are functional (only the ribbon is to be changed). Rare and authentic object, attested by a certificate of the manufacturer (see photo). Its transport box is also in good condition. The years have given him a few bursts of color but that does not take away from his charm!.