Three 'Seconda' chairs designed by the famous architect Mario Botta for the Italian firm Alias, model 602. All 4 are painted black both in the structure and in the seat, they bear the Alias logo in the cylindrical backrest, as can be seen from the photos. This piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution