$20 1990 FRN Insufficient Inking Error Missing Non-Magnetic Ink PMG Ch Abt Unc 58

$20 1990 FRN Missing Non-Magnetic Ink Error A noticeable checkerboard pattern is seen across this note that's missing the non-magnetic ink and is labeled as an insufficient inking error. Exceptionally cool. Please note there is a comment of 'small tear' that appears on the back of the holder that we are simply unable to locate. PMG Ch Abt Unc 58

Series Year	1990
Country	United States
Denomination	$20
Grade	58
Signature	Villalpando Brady
Grading Agency	PMG
Category	Small Size $20 Federal Reserve Notes
Serial No	G45378905F
Status	Active
Seal	Green (D.C.)