These Bowers lighters –tarnished and like new– were popular in the trenches of WWI. Officially called 'Bowers Kalamazoo "Slide Sleeve" Lighters' (round tube shown here), manufacturing began in Kalamazoo, Michigan in 1930.
I have collected two of the "round tube" WWI era lighters; prewar lighters were made of brass. My favorite versions are these round lighters with brass highlights– the grommet, the pull on the spring that holds the flint in place, and I especially like the brass lanyard loop.
More information can be found here: http://www.bowers-mfg.com/about-us.html