Pulp Librarian on Twitter: "The most stylish pocket calculator was undoubtedly the Olivetti Divisumma 18, designed by Mario Bellini. Its smooth look and soft shape has become something of a tech icon
Calculatrice mécanique vintage Olivetti Summa Prima 20 - Catawiki
Calculatrice Olivetti divisumma 24 ancien - Les Vieilles Choses