This was the last black & white Popeye cartoon.
Lots of references to WW2 era life. Popeye's can of spinach is worth 17 ration points. The outhouse is labeled as an air raid shelter. And Olive is practicing first aid when Popeye arrives.
The fan dancer character, Dipsy Glee, that Popeye animates (briefly) might be a take off on Gypsy Rose Lee, a legendary burlesque queen of the Minsky's era.
One of a number of Popeye shorts that were sent to Asia in the 1980s to undergo a redraw and colorization process.
The Snidely Whiplash-esque character (and his dark steed) both break the fourth wall when they turn and hiss back directly at Popeye's nephews.