planchet defects: flaws on a coin that are believed to have been in the metal before the coin was struck. These are not treated as harshly as circulation marks or defects, if at all.
planchet flaw: same as a planchet defect.
planchet defects Any of the various abnormalities found on coin blanks. These include drift marks, laminations, clips, and so forth.
planchet flaw An irregular hole in a coin blank, sometimes the result of a lamination that has broken away.
planchet defects
Various abnormalities found on coin blanks including drift marks, laminations, clips, etc.
planchet flaw ...
Light planchet defects, as struck, are noted on the obverse above Liberty's head, across her eye, and behind her in the field.
From Stack's 1976 ANA Sale, August 1976, Lot 3182.
Lovely 1856-S Double Eagle ...
The surfaces on this date are usually heavily marked from circulation and have mint-made planchet defects. Original, uncleaned high grade specimens have pleasing frosty luster and coloration ranging from a rich yellow-gold to a green-gold hue.
This test is not infallible; some struck coins do not ring because of planchet defects such as cracks or gas occlusions; also, some cast copies have been filled with glass (or other substances) and do ring.
 See also: Surfaces, Planchet defect, Gold, Grade, Struck
  
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