
The flare indicates, to cooperating air elements, a line of position or direction. It is also used for troop-recognition purposes.
The flare consists of a paper cylinder containing a pyrotechnic composition. It has a wooden base block with a 20-penny spike through it, and a match head covered by « removable metal cap, under which lies a wooden disc. A plastic film seals the metal cup to the flare body. The outer head of the wooden disc has the scratching surface required to ignite the match composition.
The flare is stuck in the ground with the spike as a support. The plastic seal is pulled off and the wooden disc scratched against the match composition, which ignites the flare.
Nothing else to see.
OP 1664, Volume 1 - US Explosive Ordnance (1947)
USNBD - Bombs and Fuzes, Pyrotechnics (1945)