<ARTICLE> 5 <RESTATED> <PERIOD-TYPE> 6-MOS 9-MOS <FISCAL-YEAR-END> DEC-31-1997 DEC-31-1997 <PERIOD-END> JUN-30-1997 SEP-30-1997 <CASH> 41,400 53,100 <SECURITIES> 0 0 <RECEIVABLES> 70,800 62,400 <ALLOWANCES> 0 0 <INVENTORY> 40,100 39,600 <CURRENT-ASSETS> 15,400 19,500 <PP&E> 428,300 431,600 <DEPRECIATION> 226,900 231,700 <TOTAL-ASSETS> 475,600 485,800 <CURRENT-LIABILITIES> 64,200 66,400 <BONDS> 89,100 88,000 <PREFERRED-MANDATORY> 0 0 <PREFERRED> 0 0 <COMMON> 4,200 4,200 <OTHER-SE> 255,200 270,600 <TOTAL-LIABILITY-AND-EQUITY> 475,600 485,800 <SALES> 237,800 343,000 <TOTAL-REVENUES> 237,800 343,000 <CGS> 168,800 244,800 <TOTAL-COSTS> 168,800 244,800 <OTHER-EXPENSES> (500) (1,400) <LOSS-PROVISION> 0 0 <INTEREST-EXPENSE> 2,800 4,200 <INCOME-PRETAX> 29,600 42,000 <INCOME-TAX> 11,300 6,700 <INCOME-CONTINUING> 18,200 35,200 <DISCONTINUED> 0 0 <EXTRAORDINARY> 0 0 <CHANGES> 0 0 <NET-INCOME> 18,500 35,200 <EPS-PRIMARY> 1.12 2.18 <EPS-DILUTED> 1.12 2.18