https://trc-images.nl/collection_images/hires/2020/2020.2083a-b.JPG#\\TRC-SERVER\TRCSharedWork\TRC Database\collection%20photographs\2020.2000\2020.2083a-b.JPG#
A pair of buttons made from a disc of horn. Each button has two sewing holes (sew throughs) set in a well.