Underwood 330

This is the electro-mechanical calculator Underwood 330 from 1976.
Actually is the same calculator of Olivetti Divisumma 33, but rebranded Underwood.

Underwood was acquired by Olivetti in 1963. They used this brand for foreign markets, and to sell devices in Italy at a lower price than Olivetti. It has been always common in Italy to have the same calculator or typewriter under these 2 brands.

This is another calculator designed by Mario Bellini.

It work with thermic paper 57 mm.

It’s more expensive than normal paper, but printing it’s more silent and you don’t need ribbons.

Here there is a video showing how it works