1) the appearance on a <#plate> (and resulting <#stamp>) of the remnants of a wrong <#design>. This occurs when an incorrect <#tranroll=transfer roll> is used to enter a design on a plate, and when, upon discovery of the mistake, the incorrect impression is not completely <#burnish=burnished> out before the correct one is entered in its place. 2) the intact appearance of an incorrect design on a plate (and resulting stamp), caused by the undetected use of a wrong transfer roll by a <#siderographer>. Classic example: 5¢ rose stamps of 1917 (<#scott=Scott> 467, 485 and 505).