Pin, from Brough of Birsay, Orkney

Bone pin with carved segmented head with disc and collar, from Birsay, Orkney

Bone pin with rudimentary animal head set at right angles to shank, from Birsay, Orkney

Bone pin with finely carved animal head set at right angles to shank, from Birsay, Orkney

Pin, from Brough of Birsay, Orkney

Pin, from Brough of Birsay, Orkney

Bone pin with flat thistle-shaped head, from Birsay, Orkney

Bone pin with circular head with disc and collar, from Birsay, Orkney

Bone pin with flat head with vertical sides and collar, dark in colour, from Birsay, Orkney

Bone pin with faceted head over collar and swelling shank, from Birsay, Orkney

Pin, from Brough of Birsay, Orkney

Mace-headed bone pin with two rows of projections round sides and one on top, from Birsay, Orkney

Bone pin with flattened ball head decorated with incised oblique opposing lines, from Birsay, Orkney

Bone pin with ball head decorated with incised cross, from Birsay, Orkney

Bone pin with circular head with disc and collar, decorated overall with dots, from Birsay, Orkney

Bone pin with ball head with collar decorated with cross and dots, from Birsay, Orkney