Unfired clay? spindle whorl

Spindle-whorl, diam. 3.5cm. Very well made hemispherical whorl, absolutely flat on the underside and smoothly domed. Made of very fine cream clay (cf. Sibertswold grave 83), probably unfired. Top decorated around central perforation by lightly incised girth-grooves, then a radiating lattice pattern, then two further girth grooves with diagonal hatching in the lowest band along rim. Hole absolutely straight through.Identification to this grave authenticated by original label on back.