<TABLE> <S> <C>

<ARTICLE> 5
<RESTATED>

<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   9-MOS                   6-MOS                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-END>                               SEP-30-1997             JUN-30-1997             MAR-31-1997
<CASH>                                         582,000                 310,000                 450,000
<SECURITIES>                                 1,948,000               1,632,000               1,561,000
<RECEIVABLES>                                3,338,000               2,809,000               3,090,000
<ALLOWANCES>                                   153,000                 150,000                 150,000
<INVENTORY>                                  6,626,000               7,223,000               7,160,000
<CURRENT-ASSETS>                            13,679,000              13,524,000              14,847,000
<PP&E>                                       4,483,000               4,481,000               4,458,000
<DEPRECIATION>                               2,190,000               2,152,000               2,119,000
<TOTAL-ASSETS>                              17,959,000              18,106,000              19,945,000
<CURRENT-LIABILITIES>                        6,221,000               6,704,000               8,872,000
<BONDS>                                      3,618,000               3,815,000               3,981,000
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                          0                       0                       0
<COMMON>                                       908,000                 908,000                 907,000
<OTHER-SE>                                   5,871,000               5,181,000               4,658,000
<TOTAL-LIABILITY-AND-EQUITY>                17,959,000              18,106,000              19,945,000
<SALES>                                     13,047,000               8,396,000               3,970,000
<TOTAL-REVENUES>                            13,047,000               8,396,000               3,970,000
<CGS>                                        7,626,000               4,901,000               2,375,000
<TOTAL-COSTS>                                7,626,000               4,901,000               2,375,000
<OTHER-EXPENSES>                             3,915,000               2,664,000               1,227,000
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                             151,000                  77,000                  40,000
<INCOME-PRETAX>                              1,566,000                 894,000                 409,000
<INCOME-TAX>                                         0                       0                       0
<INCOME-CONTINUING>                          1,566,000                 894,000                 409,000
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                 1,566,000                 894,000                 409,000
<EPS-PRIMARY>                                      .26                     .15                     .07
<EPS-DILUTED>                                      .23                     .13                     .06


</TABLE>