The well camouflaged spotter of enemy batteries', 1917 (c).

Two French observers prepare to rise up in their balloon basket. Their job was to spot enemy artillery and troop concentrations and then use a telephone to direct their own guns on to them. The basket of this balloon is fitted with a machine gun for defence as spotters were regularly attacked by enemy aircraft. Observers also used primitive parachutes. One of 193 British and Allied Official photographs taken on the Western Front during World War One. Mounted on card, some with their original captions. Associated with World War One, Western Front (1914-1918).