Sounds like Dalton & Hamer Warwickshire No. 329 (Stratford):
Obv.: Bust to left; "SHAKESPEAR"
Rev.: A man-of war sailing; "THE WOODEN WALLS OF OLD ENGLAND"
Edge: PAYABLE IN LANCASTER LONDON OR LIVERPOOL
Or it could be variety 329a if the edge is Plain (not in collar).
The rarity of both are listed as "RRR" on a scale of Common, Scarce, R (rare), RR and RRR.
Graham.