TW3658283:
Boring the nose end of the shell, undercut and screw at the National Projectile Factory, Birtley, UK, 14 June 1916 (b/w photo)
/ Bridgeman Images
TW3658295:
Boring to fit the disc, rough and finish facing at the National Projectile Factory, Birtley, UK, 14 June 1916 (b/w photo)
/ Bridgeman Images