Auxiliary booster Mk 1 Mod 0 is a standard booster shipped in either the nose or the tail-fuze seat liner (or both) of some types of GP and frag bombs weighing over 100 pounds.
No information about functioning.
TNT, 180 grams
Nothing else to see.
TM 9-1325-200, Bombs and Bomb Components (1966)
OP 2216, Volume 1 - Aircraft Bombs, Fuzes, and Associated Components (1960)