Obverse:

ELIZAB D G ANG FR ET HIB REGI. Crowned bust 6C l. with rose behind.

Reverse:

POSVI DEV ADIVTOREM MEV. Square topped shield over long cross fourchee dividing the legend. Date above.

About fine, an academic example of this very rare over mark. 

Ex W. Wilkinson Collection bt Bt D. Pockock Aug 1995

Ex Spink Auction, 4 Jul 1995 - Lot 620 (Part)

Ex Middleham Hoard