Some people insist that a tie must always be tied with a dimple, but Bond shows that it is not always necessary. There are many advantages to putting a dimple in your tie. The dimple helps to neatly fit the wide blade of your tie neatly through a tight tie knot and it helps the tie arch out from the neck. The thicker and narrower the tie the more difficult it is to get a dimple in the tie.
Without a dimple the tie will end up with a fold at one side or both sides of the knot, like in Connery’s example below. That’s how Connery’s ties usually are, and it goes well with the stylishly asymmetrical look of the four-in-hand knot. Ties as narrow as Connery’s (3 inches wide or less) are difficult to dimple.
There’s no right or wrong to dimpling a tie. Pierce Brosnan and Daniel Craig are the Bonds who most often dimple their ties, but it’s not something they do consistently.