
This round is a modified 100-pound G.P. bomb fastened to a 4.5-inch rocket motor.
Suspension lugs and base plug are removed from the standard 100-pound bomb, and a motor adapter substituted for the base plug. The motor is the standard type for the 4.5-inch Army folding-fin type of rocket, modified to take the special box-type fin. The fuze seat in the bomb is modified to receive the Point Detonating Fuze T20.
The metal crate in which the round is shipped serves as an expendable launcher.
No information about functioning.
No information about hazardous components.
Nothing else to see.
OP 1664, Volume 1 - US Explosive Ordnance (1947)