In "Cousin Maude's Visit" (1971), Archie reminisces about the first time he met Edith; she was with Maude, and he was with a buddy named Rupert Pratt. In this episode, Archie's buddy is now named Jefferson Pratt.
In the flashback scenes, the living room has the same wallpaper that was installed during season seven, and the same bird calendar from the "present day" is hanging in the kitchen.
Archie's famous chair is conspicuously absent in the flashback scenes, which according to the previous "Archie's Chair" episode, had resided in the house when Gloria was a baby.