This buckle like the chrome one in the same '28' series has a zoomorphic and knotwork border. 'Zoomorphic' is the word we use for the Celtic artwork that uses animals.
In each of the four corners are bosses containing knotwork designs and in the centre is a large boss containing a thistle encircled by a eternal interlace of knotwork. Quite a statement!
The Black Enamel Cantled Sporran and also the Black Skin EnamlCantled Sporran have a matching cantles but please note that the central boss on the cantles of these sporran does not have a circle of interlace surrounding the thistle.