Public domain
MAHON, LEONARD D. WITH STEEL HELMET HE INVENTED THAT COULD BE USED AS SHOVEL
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Subjects
Credit lineMAHON, LEONARD D. WITH STEEL HELMET HE INVENTED THAT COULD BE USED AS SHOVEL. 1917-01-01. Harris & Ewing. Harris & Ewing Collection, Library of Congress. Public domain.