So sometime between 1953 and 1954, the "release" for the pop-up paper support was re-designed.
In 1953, it was a push-button over on the right side of the paper tray (in the V-notch cut-out). See Photo 1, below.
In 1954, the "release" was moved to the middle of the paper tray with a stubby lever sticking out to use to release the paper support. See Photo 2, below.
Additionally, the left/right margin sets went from metal to plastic in the 1953 to 1954 time-frame as well.
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