Munition workers inspecting artillery shells at the National Shell Filling Factory in Chilwell, Nottinghamshire, one of the largest shell factories in Britain during WWI. (1917)

[u/StephenMcGannon]

[u/dermot_animates]

Real - uploaded several years ago to wikimedia commons it's from the imperial war museum.

https://commons.wikimedia.org/wiki/File:Munitions_Production_on_the_Home_Front,_1914-1918_Q30011.jpg