<ARTICLE> 5 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-END> JUN-30-1997 <CASH> $22,291 <SECURITIES> 0 <RECEIVABLES> 20,220 <ALLOWANCES> 0 <INVENTORY> 4,790 <CURRENT-ASSETS> 53,769 <PP&E> 42,822 <DEPRECIATION> 30,254 <TOTAL-ASSETS> 74,387 <CURRENT-LIABILITIES> 31,780 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 455 <OTHER-SE> 33,148 <TOTAL-LIABILITY-AND-EQUITY> 74,387 <SALES> 54,395 <TOTAL-REVENUES> 54,395 <CGS> 42,287 <TOTAL-COSTS> 49,399 <OTHER-EXPENSES> (951) <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 1,120 <INCOME-PRETAX> 4,827 <INCOME-TAX> 536 <INCOME-CONTINUING> 4,291 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 4,291 <EPS-PRIMARY> .95 <EPS-DILUTED> .95