
The signal is encased in a metal cylindrical body, one end of which is closed by a soldered cap and pull ring. The case can be held comfortably and safely in the bare hand during the burning period. The signal contains a pyrotechnic smoke mixture and is watertight.
The sealing tape around the end of the cylinder is torn off and the paper cap is removed. The pull ring is brought down over the rim of the can and pressed down, using the ring as a lever to break the seal. The cylinder is pointed away from the face; and a quick pull is exerted on the pull ring, which comes out of the can, thereby igniting the smoke mixture. The signal should be held at arm’s length at an angle of about 30°, so that drippings will not fall on the hand.
Nothing else to see.
OP 1664, Volume 1 - US Explosive Ordnance (1947)
USNBD - Bombs and Fuzes, Pyrotechnics (1945)