Three smiths working on a large shackle under a B & S Massey power hammer in No. 1 Smithery in Chatham Dockyard.

Three smiths working on a large shackle under a B & S Massey power hammer in No. 1 Smithery in Chatham Dockyard. The shackle is on a shaped support being held upright by a smith using tongs. Another smith is holding two moulding tools under the shackle pin. A museum copy of a Ministry of Defence photographic print.