1960 D/D Lincoln Memorial Penny • Mint Error, Large Date, Repunched Mint Mark (RPM-32) • Graded NGC MS65 Red

A curved clip mint error is a common type of clipped planchet where a coin blank is punched from a metal strip, but the punch overlaps a previously punched hole, leaving a smooth, half-moon-shaped notch or "clip" on the edge of the blank before it's struck.

These clips result from the blanking press not advancing the metal strip properly and are characterized by their curved shape and often show tell-tale signs like metal flow, a tapered rim, and a "belly line" on the edge, indicating a genuine manufacturing flaw rather than damage.