[3] In 1979 restorations were carried out upon the clock which reproduced the simple designs discovered under the ancient layers of paint.
[3] The display on the clock is based upon the geocentric model, which was not superseded until the advent of heliocentrism in the late 16th century.
The Earth is represented by a blue-green sphere positioned in the centre of the clock face.
The casing on the wall contains cogs which move the Sun and Moon models around the face of the clock.
On the outside north wall of the minster is a full-size Grenadier, called the Quarterjack, which strikes the quarter hours.