Brockage
/ˈbrɒk.ɪdʒ/noun
A coin struck with a mirror-image impression, usually from a previous coin stuck to the die.
Did you know?Brockage is a real numismatic term for a mirrored coin error, and its name likely comes from an old word for a broken or stunted piece, not from magic—though the result absolutely looks enchanted.
Etymological Timeline
Middle English
English
brocage
“a broken or damaged piece; also a fragment or irregular bit”
15th-16th Century
English
brokage
“a broken or irregular object; later a term used in minting for a coin struck from a stuck impression”
16th-17th Century
English
brockage
“a coin error produced when a previously struck coin adheres to a die and leaves a mirror-image impression”
Modern English
English
brockage
“a numismatic error coin bearing an incuse mirror image of the design”