BD, M66, M66A1, M66A2 (T8)
Fuze M66A2 and fuze M66A1 are delay action, base detonating fuze which is used with APC-T projectiles. Both fuzes are of the simple inertia type, without bore safety provision.
This is an Army fuze which has been adopted by the Navy. No Navy Mark has been assigned to this fuze, and it is referred to by its "M" designation.
Nothing else to see.