Amendment number 1 to Pricing Supplement No. 0181. Pricing Supplement No. 0181 Dated November 13, 1997 Rule 424(b)(2) (To Prospectus dated July 12, 1996 and File number: 333-7229 Prospectus Supplement dated November 8, 1996) Senior Medium-Term Notes, Series F Due Nine Months or More From Date of Issue Principal Amount: $ 10,000,000.00 Issue Price: 100.000% $ 10,000,000.00 Commission or Discount: 0.000% $ 0.00 Proceeds to Company: 100.000% $ 10,000,000.00 Agent: NationsBanc Montgomery Securities, Inc., as Principal Original Issue Date: December 15, 1997 Stated Maturity Date: February 25, 2010 Cusip #: 63858R-ER-8 Form: Book entry only Interest Rate: 6.710% Fixed Interest Payment Dates: 25th of February and August, commencing August 25, 1998 Discount Note? No May the Notes be redeemed by the Company prior to maturity? No May the notes be repaid prior to maturity at the option of the holder? No