This is a brand new Lucas 2-position or single pole, double throw toggle switch (on-off), Lucas no. 34889. It is correct for many, many British cars of the sixties and seventies, including early MGB, Triumph TR4, Spitfire, Mini, Austin, Morris, big Healey, Land Rover, and many others. It is a nicely made part, genuine Lucas, complete in a new Lucas box.
It comes with a round trim washer (as shown). If you prefer a hex washer, let us know and we may be able to find one.
Other part numbers are 108SA and PRC5610.