#create a temp. file
echo "hi " > t.tmp
# set the file time to 2 hours ago
touch -t 200405121120 t.tmp
# then check for files
find /admin//dump -type f -newer t.tmp -print -exec ls -lt {} \; | pg
$ man 1 find
...
-ctimen
The primary shall evaluate as true if the time of last change of
file status information subtracted from the initialization time,
divided by 86400 (with any remainder discarded), is n.
...