1928 $20 Federal Reserve Note, from the Cleveland district, with green seal and serial numbers.
This is the popular so-called 'numeral' note because these 1928-era FRNs featured a number inside the district seal, rather than the letters which followed in later versions.
PMG has graded this note Choice VF 35.
Friedberg # is 2050-D; serial # is D05382963A. Signatures are Tate and Mellon.
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