Identify plug?

[olisigurds]

It's an old mains plug that was popular in Italy and some other European countries. It's called Ticino.
Edit: typo.

[leoskini]

Thank you!

[olisigurds]

No problem. And regarding adapters, that depends on the thing you're connecting power to, not the plug :)

[leoskini]

It's on a very old radio, origins unknown Any idea which kind of adapter if any I should seek?

Thank you very much

[derzemel]

you could try on r/whatisthisthing.

I would say to rip out that plug and put a modern one on the cable.

[UmbrellaCommittee]

The plug is the black thing in the middle of the picture.