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The sign accompanying the F-1 engine. It reads

The F-1 Engine

Marshall's Legacy of Flight

The largest liquid-powered rocket engine ever used to launch Americans into space, the F-1 was the key to successfully "slipping the surly bonds" of Earth's gravity and sending Apollo astronauts on their first historic missions to the moon. With 1.5 million pounds of thrust and arranged in clusters of five to power the Saturn V's first stage, the F-1 was a staggering ten times more powerful than other, conventional engines of the 1950s and 1960s.

F-1 Quick Facts

Propellants:	Liquid Oxygen/RP-1 (2.27 mix)
Thrust (at sea Level):	1,500,000 lbs
Height:	18.5 feet
Diameter:	12.2 feet
Dry Weight:	18,416 lbs
First Flight:	1967
Last Flight:	1973
No. of Flights:	65

The "No. of Flights: 65" presumably means "Total No. of Engines Flown" as there were 13 Saturn V launches, each with five engines, for 65 total engines flown.