Since Excel cannot read .123 files your options may be limited to converting
the .123 files to a format that Excel can read. Such as .XLS or .WK4 by
using 1-2-3 itself or by using a third party program such as Conversions
Plus from www.dataviz.com.

You can do a Copy/Paste from 1-2-3 to Excel (manually) but formats and
formulas will be lost.

--
Jim Rech
Excel MVP