Taken from the excellent article at The Register : The Commodore 64 is 30

Commodore took the wraps off the Commodore 64, one of two immediate follow-ups to its popular Vic-20 home computer, 30 years ago this week.

The 64 made its public debut at the Consumer Electronics Show (CES), though it wouldn’t go into production until later in the year before going on sale in the US market in August. It didn’t make it across the Atlantic until late Autumn.

Commodore 64

The original 'breadbox' Commodore 64 design Source: Wikimedia

You can read the rest of the article at The Register : The Commodore 64 is 30