All very confusing.
I have a PA28-181 from 1976 - I have an "Owner's Manual" nothing that relates it to my specific airplane and a set of supplements for my autopilots (i.e. the documents issued by their manufacturers), GPS etc. which I put together myself.
This has made me think - is the insurance invalidated by the lack of this document serialised to the airplane - I can but assume that such an original document would have disintegrated over the past 40 years.
In the annuals it has had since I've had it no one has ever queried the documents I use.
Mine is one of the first Archer II's from 1976 - it has a 60" pitch prop not the 62" from later to the current day in the III - so maybe the "Owner Manual" iss for a 62" prop airplane