This grenade differs from the other smoke grenades in that the body is assembled in a cylindrical outer container. This container has eight smoke-emission ports in Its top. It also has three light metal flaps welded to the side, which may be bent outward at right angles to furnish bearing for supporting the grenade in snow. mud. or other soft surface. With the outer container, this grenade is slightly larger than the ordinary smoke grenade.
The Fuze M201 has been modified by shortening the safety lever so that it does not protrude down the side of the grenade. At the top of the body, one side is extended to form a lip for the attachment of the safety lever; the other side forms a hinge to carry the spring loaded striker.
This grenade is used for signaling, especially in snow.
No information about functioning.
Nothing else to see.
OP 1664, Volume 2 - US Explosive Ordnance (1947)