The version information of a file attachment is only available through the
API_DoQuery method with the format structured (ie
&fmt=structured) being requested.
<field id="6" field_type="file" base_type="text"> <label>file</label>
<nowrap>0</nowrap>
<bold>0</bold>
<required>0</required>
<appears_by_default>1</appears_by_default>
<find_enabled>1</find_enabled>
<allow_new_choices>0</allow_new_choices>
<sort_as_given>1</sort_as_given>
<carrychoices>1</carrychoices>
<foreignkey>0</foreignkey>
<unique>0</unique>
<doesdatacopy>0</doesdatacopy>
<fieldhelp/>
<max_versions>3</max_versions>
<see_versions>1</see_versions>
<use_new_window>1</use_new_window>
</field>
If you need access to the version information you have to use script or mockup your own versioning system using a child table as Matthew suggested.
