read on restaurant trivia bathroom wall lots of trivia about restooms...and that ..tv series/leave it to beaver was 1st series to feature a toliet.seems like it could be fiction because beaver didnt come along till much later after tv was invented.wall had many words that could be used for bathroom......including....john... and lavatory and ...etc etc can't think of all of the words at this moment.some1 knocking at door...

The Beaver thing, Snopes rates it "mostly true", with a long discussion and explanation.

Was 'Leave It to Beaver' the First US TV Program To Show a Toilet? (https://www.snopes.com/fact-check/potty-time/)

Here's the gist of the conclusion:

>>>So, in one very brief scene, viewers saw the boys feeding their baby alligator in the middle of the bathroom floor, whereupon Wally walked over to the toilet tank, put Captain Jack inside it, and placed the lid back on the tank. The toilet itself was never seen, only the very top portion of its tank.<<<

restaurant chain bathroom wall had all kinds of trivia on all the walls .....and trivia had ..tv show/leave it to beaver was 1st show that had toliet..seems like it could be fiction because tv was on long time b4 beaver debut.wall had john and lavatory and many,amny,many other words that people use............

On the first episode of Leave it to Beaver they showed a toilet tank.

Im not sure what the next show was. Maybe This Old House?