Thanks, Ivoryman.
It's interesting to observe the subtle (or sometimes stark) variations between handle colors of knives from the same time period as well as how much the color of Case's red bone in particular has changed since the early years up to the modern era.
MTTP: XX Era (1940-1964)
1940
Commonly referred to as "the war years," the first decade of the XX era, 1940, towers over every other decade of the 20th century as the most full of sorrow, patriotism, and ultimately, hope and the beginning of a new era of American dominance on the world stage. This decade left an indelible mark on all but the youngest of Americans that lasted for the rest of their lives. Those who were young and in the military were dubbed "The Greatest Generation" by former NBC News anchor Tom Brokaw, and the moniker stuck. The decade started off with a "bang" with the December 7, 1941, attack on Pearl Harbor by Japan (a "date which will live in infamy") which led directly to the USA's military involvement in WWII. After just over four years of historic battle, peace was finally reached in May 1945. FDR was elected to an unprecedent third term as president in 1940. Other notable names associated with WWII include: Harry S. Truman, Winston Churchill, Josef Stalin, Adolph Hitler, Mussolini, Hirohito, Ho Chi Minh, Anne Frank, "Tokyo Rose," Sikorsky (helicopters), Jeep (originally Willys Quad), Penicillin, Nutella, and the now ubiquitous Duct Tape.
But the 1940s weren't only about war. Just a few culturally significant names associated with this decade include: Joe Dimaggio, Jackie Robinson, Chuck Yeager, Mahatma Gandhi, George Orwell, and Walt Disney.
There's no denying that war tends to be a catalyst for invention, and not necessarily only for the purpose of slaughtering each other, either. Although, sadly, Case's red bone handle color may have changed dramatically from that of the XX era, there are some things from the 1940s that we still enjoy today. Our modern lives abound with many things that were invented in the 1940s, things we pretty much take for granted. For example, computers got their genesis in 1940 as well as cellular communications technology and the mobile phone, the transistor, color TV, aerosol spray can, synthetic rubber tire, microwave oven, Velcro, ballpoint pen, SCUBA, Polaroid camera, Elmer's glue, Frisbees, LEGOS, Slinky, M&Ms, Jolly Ranchers, Cheerios, the Whopper, meatloaf, and everyone's undisputed favorite: the Bikini (I wonder if jerryd had a hand in that invention....figuratively speaking!

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The "Greatest Generation" indeed!