[hvusslax]

Is the BTicino plug (https://www.plugsocketmuseum.nl/Italian2.html) used at all in Italy now? There was a serious attempt at adopting it in Iceland in the late 1970s to early 1980s. These sockets can still be found in homes that were built in that period and they are just called "Italian sockets".

[afiori]

Never seen such a plug before in my life, but I have spent very little time anywhere near Ticino

In Italy I have mostly seen (https://www.plugsocketmuseum.nl/Italian1.html) 1,2,4,5, schukos like 17a and when lucky schukos like 9 and 10; I have never seen most of the others.

[dingo454]

Never seen this one in Italy, and I've been in several fairly old buildings.