diff --git a/doc/forum/Best_way_to_remove_old_version_of_specific_file/comment_6_e854d6b778bcb7dc1578cbc9c8fcaa42._comment b/doc/forum/Best_way_to_remove_old_version_of_specific_file/comment_6_e854d6b778bcb7dc1578cbc9c8fcaa42._comment
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+[[!comment format=mdwn
+ username="joey"
+ subject="""Re: Dropping all older versions of a file"""
+ date="2023-08-22T16:23:29Z"
+ content="""
+@mario interesting question..
+
+You could use `git log --raw` to list old versions of the file, and
+then use `git show` to find the git-annex key.
+
+Doable, but would take quite a lot of bother to script.
+I think it would be a good enhancement to git-annex to
+add a [[todo/command_to_list_keys_for_old_versions_of_files]].
+"""]]
diff --git a/doc/todo/command_to_list_keys_for_old_versions_of_files.mdwn b/doc/todo/command_to_list_keys_for_old_versions_of_files.mdwn
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+++ b/doc/todo/command_to_list_keys_for_old_versions_of_files.mdwn
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+A command like `git-annex oldkeys $file` that lists the keys used for all
+previous versions of the file.
+
+It would allow a workflow like eg:
+
+    edit foo
+    git-annex add foo
+    git-annex oldkeys foo | git-annex move --batch-keys --to bar
+
+Or like this:
+
+    git-annex oldkeys foo | git-annex get --batch-keys
+    # proceed to diff between old versions of the file 
+    # (although git-annex-diffdriver --get is another way to do this)
+
+Or this to make every old version visible as files:
+
+    n=0
+    for k in $(git-annex oldkeys my.gif); do
+        $n=$(expr $n + 1)
+        ln -s $(git-annex examinkey $k --format='${objectpath}') my.$n.gif
+    done
+
+----
+
+Is oldkeys the best name for this? `git-annex log` is already taken.
+--[[Joey]]