~ UK WWI Recruitment Campaign poster, 1914-1916
via Imperial War Museum

~ WAC Recruiting, Seventeen Magazine, 1944
via Seventeen Magazine Vintage
(click to enlarge)

~ Harbutt’s Fibrous Plasticine; The English Review, December 1915
via Internet Archive

“A small piece made into a plug and placed in each ear effectually cuts up the nerve-shattering concussions of high explosives, and so prevents that terribly distressing form of deafness that so often follows an action.”

~ The Australian Women’s Weekly, June 15, 1940
via Trove

~ Canadian Y.M.C.A. in London, c. 1914 - 1918
via Library and Archives Canada
(click to enlarge)

~ WWII recruiting poster as reproduced in the Spring 2010 issue of Colonial Williamsburg magazine

Thanks to Shades and Shadows!