According to Science magazine: NASA Dives Into Its Past to Retrieve Vintage Satellite Data:
"They cleaned, rebuilt, and reassembled one drive, then designed and built equipment to convert the analog signals into an exact 16-bit digital copy. "It was like dumpster diving for science," says Cowing, co-team leader at LOIRP. In November 2008, the team recovered their first image: a famous picture of an earthrise taken by Lunar Orbiter 1 on 23 August 1966. The team's new high-resolution version was so crisp and clear that it revealed many previously obscured details, such as a fog bank lying along the coast of Chile. "We thought if the Earth's surface looks that good a quarter of a million miles away, what does the moon's surface look like 100 miles beneath it?" says Cowing."
Keith's note: A number of us have been donating time and money to this project since 2008. Please support the Lunar Orbiter Image Recovery Project at RocketHub as our team works to finish this project.
More information on this image can be found here and here as we overlaid Nimbus II imagery on a Lunar Orbiter image of Earth. Oh yes, on this date, in New York City, just over the Earth's limb as seen from lunar orbit, the Beatles were preparing to play at Shea Stadium ...