Hi mickmate. Here is a pic of a 289 tool kit which was posted by one of the members in a previous thread and a cropped blow-up of the spanner clip sitting next to the hammer.
Notice the "rippley" top on the spanner clip and now compare to this pic of the top of my clip.
Looks similar to me. What do you think?
I also have a pic of a clip similar to what you described which I will post later.
Cheers
Greg