Collection of five items, each signed by a scientist or inventor, including: Robert A. Millikan (signature), Charles Steinmetz (check), John C. Warren (LS), Benjamin Waterhouse (signature), and James Van Allen (TQS). In overall fine condition, with repaired separations to the Warren letter. Accompanied by two unsigned photos. Pre-certified PSA/DNA.
This item is Pre-Certified by PSA/DNA
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