PART VI. Striking Errors:

Brockages:

First Strike Brockages

Definition: A brockage is an incuse, mirror-image design generated when a coin is struck into a planchet.

NOTE: Brockages can be in-collar, out-of-collar, centered, or off-center. They can be aligned with, or rotated relative to, the opposite, die-struck face. The degree of expansion and distortion depends on how many previous planchets were struck and whether one or both participants in the error were confined by the collar.

A Lincoln memorial cent with an in-collar, first-strike brockage of the reverse design on the obverse face. A cent that had stuck to the obverse (hammer) die was struck into the next planchet that was fed into the striking chamber beneath it.