<ARTICLE> 5 <LEGEND> This schedule contains summary financial information extracted from Second Quarter Report to Stockholders and is qualified in its entirety by reference to such financial statements. </LEGEND> <MULTIPLIER>1,000 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> JUN-28-1997 <CASH> 4,390 <SECURITIES> 4,500 <RECEIVABLES> 19,433 <ALLOWANCES> 0 <INVENTORY> 16,119 <CURRENT-ASSETS> 90,282 <PP&E> 80,846 <DEPRECIATION> 59,241 <TOTAL-ASSETS> 111,897 <CURRENT-LIABILITIES> 21,532 <BONDS> 0 <COMMON> 5,153 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <OTHER-SE> 81,517 <TOTAL-LIABILITY-AND-EQUITY> 111,897 <SALES> 32,322 <TOTAL-REVENUES> 32,322 <CGS> 25,232 <TOTAL-COSTS> 32,719 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> (146) <INCOME-PRETAX> 677 <INCOME-TAX> 417 <INCOME-CONTINUING> 260 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 260 <EPS-PRIMARY> 0.05 <EPS-DILUTED> 0.05