The only time we ever see a piano in the Sanford's living room
According to Lamont, Elizabeth died in 1949.
The song Fred Sanford sings at the start of the episode is "Carolina in the Morning"
Like a number of first season episodes, this one was based off a Steptoe and Son episode, however, this is the only one that uses the same episode name.
The pack of cigarettes on the table is "True Menthol" which was a low tar cigarette and relatively new at the time.