This is the first appearance of the nephew named Poopeye. In Wimmin Is a Myskery (1940), where the other 3 children debuted, he was called Pepeye.
One of a number of Popeye shorts that were sent off to Asia in the 1980s to undergo the infamous redraw and colorization process.
References are made by Popeye to pianist Paderewski, actor and dancer Fred Astaire, and prize fighter Jack Dempsey, all popular figures of the era.
Although Popeye and Olive both have nephews, their siblings are never introduced to the series.