A sleeve ornament for fastening the cuff of a leather or home-spun tunic. Some examples of Anglo-Saxon make, 6th century, found in East Anglia, are rectangular, others have a pyramidal upper half; they are made of cast bronze, brightened by a graver and then gilded, and have holes for being sewn to the garment.
From: An Illustrated Dictionary of Jewelry, autor: Harold Newman, publishers: Thames and Hudson