The Tinder Lighter is a historical item that can be found in Valiant Hearts: The Great War. It can be found near the end of Emile's training in Casern during Chapter 1.
Location[]
The tinder lighter can be found before raising the Tricolore flag at the end of training. Walk as far as you can to the right and the lighter will be located on the ground.
Description[]
"While petrol lighters were popular in the trenches, soldiers also used tinder lighters. The cotton wick was doused in saltpetre or lead chromate to make it more readily inflammable and was extinguished by simply drawing the wick back into the cylinder."