
Fuze M89 is a single action type providing superquick functioning on target impact. It arms at relatively low speeds of rotation for use with 57mm recoilless rifle ammunition.
No information about functioning.
Nothing else to see.
MIL-HDBK-146, Fuze Catalog (1982)
TM 9-1300-203, Artillery Ammunition (1967)
TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)