Great Britain
Elizabeth II Mint Error - Struck on aluminium Planchet 1/2 Penny 1966 MS61 NGC, cf. KM896, cf. S-4158. 2.2gm. Struck on a foreign aluminium planchet. Bright with silver luster, a very rare off-metal error and somewhat conservatively graded.
From the Engelen Collection of World Coinage
HID02901242017
Estimate: 500-700 USD