In Thunderball, Bond wore a short black boot with his suits. It might be more appropriate to call it a tall shoe as it hardly reaches the ankle. It has no laces but it has elastic under the instep to help get it on and off. The literary Bond did not like laces, so this shoe is quite appropriate for the character. It’s more formal than a loafer and more acceptable for a suit.
This boot is made from 3 pieces of leather, the two quarters and the vamp. The two quarters are held together over the instep with a strip of elastic. The shoes is essentially a taller version of the Alfred Sargent Burlington pictured below. The shorter Burlington is very similar in style to the shoes Bond wore in You Only Live Twice.
This boot is not the same one that was worn in Goldfinger. The boot in Goldfinger (see picture below from the scene on the laser table) was more like a short Chelsea boot and with a elastic gusset on the sides. This boot was also worn in the Fort Knox scene.