This is a bar-type, variable time (VT) fuze with a nominal MinSAT of 3,600 feet. Like the M166E1 it has the transverse bars (dipoles) strengthened so that they can be used to screw the fuze into the bomb without a wrench. It also has a clearly labeled, knurled thumbscrew for adjusting the sensitivity of the fuze.
No information about hazardous components.
MIL-HDBK-146, Fuze Catalog (1982)
TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)
TM 9-1325-200, Bombs and Bomb Components (1966)