1999 is a while ago...
i think your Christian Gassner was born on 1/13/1834 in Windstein, Bas-Rhin, Alsace. Seehttp://etat-civil.bas-rhin.fr/adeloch/index.php
Book Windstein N 1834, page 3 of 12
Maybe his wife was Caroline Schaaf, born 8/4/1834 in Niederbronn, Bas-Rhin, Alsace. See Niederbonn N 1834, page 16 of 26.
I don't find her marriage record.
If you are interested in more information, let me know.