Fred Mertz: [seing their London hotel rooms for the first time] I say, old bean, ain't this the nuts?
Ethel Mertz: [bursting at the seams] What a city this is!
Ricky Ricardo: How's your room?
Fred Mertz: It's great. Just like this, same view and everything.
Ethel Mertz: Ehhhh, one thing stumped him, though... He didn't know how much to tip the bellhop.
Fred Mertz: I didn't know whether to give him tuppence or threepence.
[he uses the common pronunciation 'thruppence']
Ricky Ricardo: Fred, threepence is only about three cents.
Ethel Mertz: Well, he solved it rather neatly.
Lucy Ricardo: What'd he give him?
Ethel Mertz: Nuppence!... Fred is now the darling of the bellhops on two different continents!