Biro
A kind of ballpoint pen - a pen that has a small ball-bearing at its tip that picks up ink by rolling against an ink reservoir. Available in several colours and, although not a precise tool, biros are sometimes favoured for drawing because of the lively spontaneous marks they make.
OF 1
Lydia Sokolova
by (Arthur) Derek Hill
1954
NPG 6463
Sir Charles Clore
by Graham Vivian Sutherland
1967
NPG 6465
OF 1
