<ARTICLE> 5 <LEGEND> THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE FINANCIAL STATEMENTS INCLUDED IN THE ACCOMPANYING FORM 10-Q AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. </LEGEND> <MULTIPLIER> 1,000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> SEP-30-1998 <CASH> 31,246 <SECURITIES> 5,471 <RECEIVABLES> 33,063 <ALLOWANCES> 0 <INVENTORY> 26,423 <CURRENT-ASSETS> 117,356 <PP&E> 110,638 <DEPRECIATION> 81,671 <TOTAL-ASSETS> 187,171 <CURRENT-LIABILITIES> 44,952 <BONDS> 4,175 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 14,374 <OTHER-SE> 91,244 <TOTAL-LIABILITY-AND-EQUITY> 187,171 <SALES> 147,146 <TOTAL-REVENUES> 150,535 <CGS> 109,931 <TOTAL-COSTS> 138,158 <OTHER-EXPENSES> 956 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 119 <INCOME-PRETAX> 11,302 <INCOME-TAX> 4,320 <INCOME-CONTINUING> 6,982 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 6,982 <EPS-PRIMARY> .57 <EPS-DILUTED> .55