
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               JUN-30-1997
<CASH>                                       1,900,270
<SECURITIES>                                         0
<RECEIVABLES>                               18,638,580
<ALLOWANCES>                                   254,735
<INVENTORY>                                 14,375,937
<CURRENT-ASSETS>                            37,719,157
<PP&E>                                      6,402,7108
<DEPRECIATION>                              38,228,358
<TOTAL-ASSETS>                              67,917,789
<CURRENT-LIABILITIES>                       13,234,389
<BONDS>                                     14,000,000
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                     1,102,580
<OTHER-SE>                                  22,579,712
<TOTAL-LIABILITY-AND-EQUITY>                67,917,789
<SALES>                                     65,638,007
<TOTAL-REVENUES>                            65,638,007
<CGS>                                       34,143,462
<TOTAL-COSTS>                               61,092,361
<OTHER-EXPENSES>                               909,861
<LOSS-PROVISION>                                96,655
<INTEREST-EXPENSE>                             533,104
<INCOME-PRETAX>                              3,736,679
<INCOME-TAX>                                 1,788,959
<INCOME-CONTINUING>                          1,846,826
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 1,846,826
<EPS-PRIMARY>                                     5.14
<EPS-DILUTED>                                     5.14
        

</TABLE>
