The jewelry sign in the store is spelled "jewlery".
ABC originally broadcast this episode in black and white.
Tex Avery's "Droopy Dog" off-screen voice actor, Bill Thompson spoke a very slow one sentence cameo, inside the jewelry store, where Barney Rubble bought the engagement ring, that Wilma Flintstone discovered & thought Fred had bought it & was hiding from her.
During Barney's "fight" with the Champ the actual time that Barney stays in the ring from the ring of the bell is only 24 seconds.
Fred states for a credit application that his full name is Fred F. Flintstone.