  In this second paper in a series, we show that the the general statistical
approach to nonrelativistic quantum mechanics developed in the first paper
yields a representation of quantum spin and magnetic moments based on classical
nonrelativistic spinning top models, using Euler angle coordinates. The models
allow half-odd-integer spin and predict supraluminal speeds only for electrons
and other leptons, which must be treated relativistically. The spin operators
in the space-fixed frame satisfy the usual commutation rules, while those in
the rotating body-fixed frame satisfy "left-handed" rules. The commutation
rules are independent of the structure of the top, so all nonrelativistic
rigidly rotating objects must have integer or odd-half-integer spin. Physical
boundary conditions restrict all mixed spin states to involve only
half-odd-integer or only integer spin eigenstates. For spin 1/2, the theory
automatically yields a modified Pauli-Schr\"odinger equation. The Hamiltonian
operator in this equation contains a rigid rotator term and a term involving
the square of the magmetic field, as well as an interaction term having the
usual form in spherically symmetric and some cylindrically symmetric models,
valid for any magnetogyric ratio.
