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Futura Blackwas made slightly more gentle by replacing the 'R's traingle leg with a curved one. The shapely apostrophe and '7' are also not part of the Futura Black we know now. These could have been modifications or part of a phototype version of the typeface.
Source: https://www.flickr.com.Scan by Alden Jewell. License: All Rights Reserved.
Source: https://www.flickr.com.Scan by Alden Jewell. License: All Rights Reserved.