Brolin totally OWNED this one!
I was very interested in this movie since seeing that the trailer pictured a flip clock. I'm very big into movie/TV flip clocks. The movie pictures a GE Model 8113. Which is actually quite out of place as it was actually produced in the 1970s.
I wrote an article about the whole thing
The Hail, Caesar! Flip Clock
That's an interesting anachronism to catch, I guess the set designer(s) didn't know that the flip clock dates from the late '60s and not '50s. Makes you wonder what other anachronisms are in the movie.
The thing I keep noticing is that the Western Electric phone shown model (302) was actually on the way out in the 1950s, and I can't find a multiline version anywhere.
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So they used a less than modern phone on a big shot executive's desk and a clock from the future. A friend said to me, "maybe the character wanted a classic phone". Problem is, it wouldn't have seemed classic then, just out of style. And that character appreciated style.
Im trying to figure why people think the movie was set in 1951. There is a reference in the movie to the hydrogen bomb test on Bikini Atoll occurring "a few weeks" before, which would set the movie on March 15, 1954 - the Ides of March ("Beware Caesar ..."). That just fits perfectly.The replacement for the 302, was the 500 and it wasn't introduced until 1950, and the movie is set in 1951. Bell didn't replace working phones until they needed to, so I find it highly unlikely that he'd have a 500. I'm not even sure if the 540 multiline version was even available in 1951.