1953 Australian Florin Coin
Retained Lamination Error on the Obverse over Elibeth II's Hiar and Wreath.
A lamination error occurs when metal flakes off the surface of a coin or planchet. It is generally believed that the flaking, peeling, and cracking is due to impurities in the alloy which causes metal to separate along horizontal planes of weakness.
A retained lamination error is a flake that remains attached to the main body of the coin.
28.5 mm in diameter