I found a box of these subtly decorated silver tone buckles in an old warehouse I cleared.

They are big - measuring 9 by 4.2cm, and is wide enough for a belt just under 3cm wide.

The buckle is slightly curved upwards, allowing the belt to sit neatly underneath, and is made of a light metal.

The surface has a regular impressed pattern.

The last photo shows the back of the buckle.