Spoilers below. Facts checked 2026-11-12. Play this puzzle
Scene: A British trench on the Somme, autumn 1916
Fits: An officer's trench watch. Trench (wrist) watches came into military use in World War I.
Source: Wikipedia: Trench watch
Fits: Gas masks. Modern gas masks were developed during World War I.
Source: Wikipedia: Gas mask
Fits: A tank rolling forward. Tanks first went into battle at Flers-Courcelette on 15 September 1916.
Source: Wikipedia: Tank
ANACHRONISM: A walkie-talkie. Walkie-talkies came out of R&D begun in 1940; Hings' model was in military service by 1942.
Source: Wikipedia: Walkie-talkie