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Sign in front of the spacesuit. It read:

Mercury Spacesuit

The "shining armor" of the Mercury astronauts was a modified U.S. Navy MK-IV pressure suit. Gus Grissom wore this one during the 15-minute suborbital flight aboard Mercury-Redstone 4 Liberty Bell 7 (July 21, 1961). The MK-IV, with its fiberglass helmet, protected the astronaut if the Mercury capsule's air escaped into the vacuum of space.