Armillary equinoctial pedestal dial for latitude 51° 30' North. Brick and stone plinth, on which is set a bell made of bell-metal. The armillary dial is positioned on top of the bell. It consists of a meridian ring, an equatorial ring and a further three rings perpendicular to the meridian ring (one at 90° to the equatorial ring, the other two each at 45° to the equatorial ring). The axis of the dial is marked by a long thin rod which has been restored to its original arrow shape. The equatorial ring has an hour scale in its northern half, numbered clockwise VI-XII, I-VI. There are no other markings on the instrument. It is a simplified armillary sphere in which the shadow of the axis marks the time on an hour scale on the equinoctial circle. It was made for the Royal Observatory, Greenwich.

For more information regarding this dial please refer to the OUP & NMM catalogue, 'Sundials at Greenwich'.