When searching for a way to find all files in a clearcase repo that changed since date X i found two approaches
cleartool find . -type f -branch "brtype(abranch)" -element "{created_since(10-Jan)}" -print
as stated here
and
cleartool find . -type f -branch "brtype(abranch)" -version "created_since(10-Jan)" -print
as (though modified to resemble the same branch) found here
What is the difference between the created_since filter in -version and -element? The results do differ.