Obv: (mullet)EDWARD.FISH. AT , around radiant sun with a face.
Rev: Mirrored impression of the obverse (obverse brockage).
The reverse normally reads: THE . SVNN . IN . WAPIN , around E.F
M. Dickinson 3296.

A brockage occurs when a coin is struck and then sticks to usually the bottom die. Then a new planchet is fed in and struck. The original coin that was stuck then acts as the bottom die and leaves an incuse reversed image on the other side of the second coin.

Sold April 2012