X0101 EFFECT 33 LIVE 2006-09-21

N-4

0000790163 NML VARIABLE ANNUITY ACCT C OF NORTHWESTERN MUT LIFE INS CO 333-133381 S000000062 NML VARIABLE ANNUITY ACCT C OF NORTHWESTERN MUT LIFE INS CO C000034306 Flexible Payment Variable Annuity (Network Edition)