I don't disagree, but it appears there were a couple of different control valves for those model years. The SM I have on hand lists a quad ring or lip seal depending on the chamfer at the seal location. I ordered 6665089 (Lip seal) and 6646372 (Quad ring) to be safe. Searching online came up with 6683274 so I ordered that one as well just in case.
When I pulled the spool I had the long chamfer in the housing, so I installed the lip seal. The ones I am getting rid of were a larger diameter, but not so large it was obvious when they arrived.