Okay, so I was wrong, the window (fake) was added--don't know why it had to be put on, as it does' make much aesthetic difference to me, with, or without...
Let's just see how much & how well, then future generations really will know the history of & behind this property; the show was the last escape from reality of how the American family would be rapidly changing, and trying to cling on the brief, half-hour fantasy of a "what was", available on just about every TV screen...
-- Dave