Figure 2. A provenanced pair of ‘Sudan goggles’ from the Edinburgh Castle Museum, 1st Battalion, Scots Guards (Ref. 2.). The cups are made of fine wire mesh formed into a hemispherical tear-drop shape. Simple tie-up straps attach to a remarkably small metal eye on the temporal point of the soldered cups. The bridge is a small chain covered in a tube of cloth; crude adjustment is possible by adding or removing links. They were issued in an oval soldered sheet tin container, clear lacquered on the outside