1689 Maundy Threepence of William and Mary grading as VF.
This is the type with hyphen stops on obverse and LMV of GVLIELMVS over MVS.
Obverse; Conjoined busts. Reverse; Crowned value separating date. Composition; 0.925 silver.
ESC 1987A and rated as Scarce by Rayner.