Which major brand significantly simplified its logo during World War II (1939-1945) due to rationing and production constraints, removing decorative elements but maintaining its core identity?

Throughout history, company logos have evolved to reflect changing cultural and design trends. Some iconic brands have undergone remarkable transformations while maintaining their core identity. This trivia question explores how one of the world's most recognized brands adapted its visual identity during a pivotal historical period, showing how product design intertwines with broader historical movements.

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Coca-Cola temporarily removed its distinctive script flourishes and simplified its logo to save red ink and production costs
Ford Motor Company changed its signature blue oval to a simpler black and white design to conserve color printing resources
General Electric removed the circular emblem and used only the letters 'GE' to minimize material usage in physical signage
Shell Oil eliminated the detailed shell illustration in favor of a basic outline to reduce printing complexity and costs