Anglesey 8, 1787 pennies (Dalton & Hamer, page 330)

Denomination: penny, scarcity: Extra rare (RRR)
8.  O: Druid's head in a wreath of oak. Twenty-one acorns in wreath, eleven
       to the left and ten to the right.
    R: Blank.
    E: Plain.

This is a proof struck in tin.

No. 8, RRR.