"The Wrong Box" is a star-studded British farce from 1966, revolving around the winding down of a tontine. As the link to Wikipedia explains, a "tontine" is a bizarre but real legal construct that involves a group of people all hoping the other members of the group will die before they do, because the last living person gets all the remaining money. Wikipedia refers to it as a "mortality lottery."

By 1900 or so (I don't think the date is ever stated), brothers Masterman Finsbury (John Mills) and Joseph Finsbury (Ralph Richardson) are elderly, the only two remaining members of a tontine. The two haven't spoken for 40 years, despite living next to each other. Masterman lives with his grandson Michael (Michael Caine) who is a medical student. Joseph lives with his granddaughter Julia (Nanette Newman) and his two two nephews Morris (Peter Cook) and John (Dudley Moore). The death of the third-last person in the tontine triggers a series of shenanigans between the remaining two and the people surrounding them.

My primary problem with the movie is that every single one of the people involved is a moron. Michael and Julia are sweet, but fools nevertheless. And everybody else is reprehensible. Many movie-goers have no trouble with this, but I find I need sympathetic characters to care about: there are none here.

Despite which, there are a huge number of jokes delivered by some of Britain's best actors and comedians (including - not mentioned yet - Peter Sellers). Some are duds, but enough hit home that I was somewhat amused. I can't recommend the movie, but if you decide to watch it the sheer density of jokes will probably have you laughing at something.