A few days ago I was in an RV park in Indiana. There was a 1968 Winnebago there, and I took pictures of it. I also got a look at the original documents, and scanned most of them.
See them here. I have a full PDF file of the brochure and the Owners Manual if someone wants it. It appears, from the documents the guy had, that the rig was sold in February of 1969, and the company gave the original purchaser all 1969 documents, or maybe he picked them up later. Who knows.
The rig is 1968, not a 1969.